CN103079155A - Double-basin-frame combined type loudspeaker system with precise ring-shaped pipe composite channel group - Google Patents

Double-basin-frame combined type loudspeaker system with precise ring-shaped pipe composite channel group Download PDF

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CN103079155A
CN103079155A CN2013100292382A CN201310029238A CN103079155A CN 103079155 A CN103079155 A CN 103079155A CN 2013100292382 A CN2013100292382 A CN 2013100292382A CN 201310029238 A CN201310029238 A CN 201310029238A CN 103079155 A CN103079155 A CN 103079155A
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inner sleeve
ring pipe
passage
composite channel
outer tube
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CN103079155B (en
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石杰
石丰山
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Abstract

The invention discloses a double-basin-frame combined type loudspeaker system with a precise ring-shaped pipe composite channel group. The combined type loudspeaker system is characterized in that a double-basin-frame cone loudspeaker is structured, the precise ring-shaped pipe composite channel or channel group is upwards arranged behind or before the double-basin-frame medium-low cone loudspeaker, the acoustic radiation environment, the process influencing the acoustic transferring radiation and the outputted acoustic field are limited, the fidelity and the radiation efficiency of the forward and backward radiating acoustic waves are improved; when the loudspeaker works at low frequency, the precise ring-shaped pipe composite channel consists of a ring-shaped pipeline acoustic transformator and a ring-shaped pipe acoustic mass element; the total equivalent vibration mass of the loudspeaker is increased due to combined action of the acoustic transformator and the acoustic mass, so that the low-frequency resonant frequency of the loudspeaker is reduced and further the low-frequency radiating efficiency is improved; and a vibrator of the double-basin-frame loudspeaker enclosed by the precise ring-shaped pipe composite channel or the channel group is also not directly interfered by external air, the surface load balance or forward and backward load balance can be maintained and the dynamic reaction speed can be increased.

Description

The accurate ring pipe composite channel of two basin framves group combination speaker system
Technical field:
The present invention is the accurate ring pipe composite channel of two basin framves group combination speaker system, belongs to the electroacoustic techniques field.
Background technology:
In the daily life, people are often with the loud speaker sound of resetting.After bass cone loudspeaker in the electrodynamic type commonly used (comprise bass, middle bass, Squawker and full range speaker, below also referred to as loud speaker) completes, the resonance frequency omega of the resonator system of its low frequency power 0Just determined ω 0Determined the lower limit of this speaker playback sound frequency, and usually to be installed in the loud speaker of working on the infinitely great baffle as reference, the loud speaker frequencies omega has been described 0Etc. index.In this case, be placed in the loud speaker on the infinitely great baffle, directly the air of former and later two directions carried out free radiation transmission sound, its ω 0=, M MThe total equivalent mass of expression electrodynamic loudspeaker comprises cone basin equivalent mass M 1, voice coil loudspeaker voice coil equivalent mass M 2, vibrating body is positive with shaking mass M MR1, the back side is with the mass M of shaking MR2, i.e. M M=M 1+ M 2+ M MR1+ M MR2C MThe total equivalent force of expression electrodynamic loudspeaker comprises yoke ring mechanical compliance C M1, central washer mechanical compliance C M2, i.e. C M=.
Usually can only not utilize the baffle sound of resetting with such loud speaker, at that rate, the sound wave of the single spin-echo that former and later two directions of loudspeaker vibrating body give off can aloft mix mutually and offsets loss loud speaker sound reproduction ability.During use, loud speaker can not be installed on the infinitely great baffle and use, and it is always with audio amplifier, utilizes the baffle of sound box to cut apart, the sagittal acoustic irradiation of limiting loudspeaker vibrating body.Just the reference environment for use from loud speaker is different for these, will affect the performance of loud speaker.
But when loud speaker is contained on the audio amplifier when consisting of sound box system and using, the loud speaker entrained acoustic energy of radiated wave behind is subject to the encirclement of casing, fail in casing, to exhale, can not directly be utilized, and these sound waves are affected by reflex back and forth to the vibrating body of loud speaker by the loudspeaker box internal environment also can, and the acoustic pressure of reflected wave, can disturb the vibration of loudspeaker vibrating body, further affect ability and the effect of loud speaker radiation sound, and, it is nearer for these object distance of loud speaker surrounding environment, affects also larger.This surrounding enviroment are on the impact of loud speaker radiation, are embodied in to have changed the total equivalent M of loud speaker M, C MNumerical value, also affected the low-frequency resonant frequency of loud speaker, therefore, the low-frequency range of speaker playback sound in the sound box system is to be determined by loud speaker and sound box two aspect factors.For following formula, if the impact of sound box can make the total equivalent force C of loud speaker of this moment MOr total equivalent mass M MStrengthen, can make ω 0Descend the loud speaker more bass of can resetting out.
But actual conditions are opposite.Usually external according to forward when loud speaker, the traditional approach of radiation sound in the casing is installed on the audio amplifier of common structure uses dorsad, can not effectively increase its total equivalent mass M M, on the contrary, but always make its vibrating body back side with quality and the total equivalent force C of shaking MReduce.As shown from the above formula, this will make the low-limit frequency of the sound that sound box system resets out, than the resonance frequency omega of single loud speaker 0Improve, cause loud speaker to lose the ability of some playback low-frequency sounds.
The total equivalent force C of loud speaker in the above-mentioned situation MThe reason that reduces, because the air in the audio amplifier consists of an acoustic compliance element, when loudspeaker vibrating body works in low frequency, it is just as a resilient spring, give from behind resiliency supported of loudspeaker vibrating body, from the loud speaker outside limits resonance of its vibrating body, make the moving difficulty that becomes of loud speaker low-frequency resonant, can not promote the original many like that sound of air radiation, so its low-frequency resonant frequency raises.Usually, the sound box volume is less, and the elasticity that the casing air produces is larger, compliance less (its coefficient of elasticity equals the inverse of compliance coefficient), and vice versa.The elastic reaction of this acoustic compliance element of casing air, show in the superincumbent calculating formula, this acoustic compliance element when being exactly low frequency, equivalent parallel is to the existing mechanical compliance element of loud speaker itself, make loudspeaker vibrating body increase " bullet " property, reduced the total equivalent force C of vibrating body M" suitable " property, cause its ω 0Raise.This situation is in common sound box system, and is in the audio amplifiers such as airtight audio amplifier, reflex cabinet, all like this.That is, be combined formed sound box system with traditional loudspeaker box structure according to traditional loud speaker and occupation mode thereof, can't in use reduce the low-frequency resonant frequency of finished product loud speaker.
Therefore, allowing traditionally sound box system playback high-fidelity, the most popular method of lower frequency sounds more, is to adopt bigbore woofer.Heavy caliber woofer cone area is larger, can promote more air vibration radiation, and its vibrating body is also heavier, and this allows the total equivalent mass M of loud speaker MTherefore strengthen, make ω 0Descend.This dependence increases the way that the loudspeaker vibration weight reduces the loud speaker frequency, mean and to promote this loud speaker with how valuable cones material and larger power amplifier, loud speaker also must have more big and heavy voice coil loudspeaker voice coil to bear the power of amplifier, loud speaker also needs larger magnet to make its vibration to produce larger motive force, therefore production and the use cost of this method are very high, and produce, debug also more complicated.During with heavy caliber woofer playback middle pitch, also can make dynamic response slow because its vibrating body is heavier, affect the middle pitch hi-fi reproduction, at this moment, for taking into account the playback of bass and middle pitch, often use simultaneously a heavy caliber woofer and a Squawker, reset respectively bass and middle pitch, but this causes higher cost and workload.
And, usually be installed in when using on the sound box when common medium and low spectrum loudspeaker, for fear of the impact of casing standing internal wave on loud speaker, loud speaker is not installed in the middle of casing baffle usually, and to impose on the interference that vibrating body goes up dorsad be unbalanced to the reflected wave of various frequencies in this kind situation lower box, and this has also affected the load balancing of vibrating body, can affect its flexible vibratory, reduce reaction speed, reflected wave is to the interference of vibrating body, also Caused Vibration distortion.
Patent of invention " a kind of speaker system " (patent No.: ZL02110023.3) provide speaker operation when low frequency, utilized the acoustic mass in the transaudient sleeve pipe of the special-purpose radiation of loud speaker, increased the total equivalent mass M of loud speaker M, effectively reduce the technology of the low frequency power resonance frequency of medium and low frequency loud speaker.
" a kind of speaker system " is to be installed in special-purpose radiation channel that loud speaker goes up dorsad and to be combined the speaker system that forms with one by a medium and low spectrum loudspeaker, the core work of " a kind of speaker system " is the transaudient sleeve channel of dorsad installation at loudspeaker vibrating body, be used for radiation, transmit loud speaker sound dorsad, this passage is dorsad unique passage of outside radiation sound of loud speaker, loud speaker vibration radiation dorsad will spread out of outside the passage by the air load between sleeve pipe.
Air in one section annular space in " a kind of speaker system " between loud speaker and internal and external casing consists of an acoustic compliance element C A, when speaker operation during in low frequency, the air in the ring pipe space that sectional area is identical between inside and outside two sleeve pipes consists of the acoustic mass element.Namely this moment, " a kind of speaker system " mainly was loud speaker and an acoustic compliance element of a low frequency operation and the complex sound structure that acoustic mass element is connected formation mutually on structure.When speaker operation during in low frequency, the acoustic mass of acoustic mass element in the transaudient sleeve pipe will become the part of loudspeaker vibration quality, and make the total equivalent oscillating mass M of speaker system MIncrease.According to above-mentioned loud speaker low-frequency resonant frequencies omega 0Formula as can be known, this can reduce loud speaker low frequency power resonance frequency, and loud speaker is given off than original lower low-frequency sound.
When " a kind of speaker system " being installed to when using on the loudspeaker box, because loudspeaker vibrating body is subject to dorsad transaudient sleeve pipe and surrounds on a large scale, this has been avoided the reflective sound wave of various frequencies in the casing to comprise that standing wave directly acts on the vibrating body largely, this can improve the antijamming capability of loud speaker, and keep the dorsad uniform balance of acoustic load of loud speaker, be conducive to improve the reaction speed of vibrating body.
The acoustic mass that " a kind of speaker system " exists in the transaudient sleeve channel during with low frequency operation improves the total equivalent oscillating mass M of loud speaker M, reducing the method for common finished product medium and low spectrum loudspeaker low-frequency resonant frequency, the utmost point has essential meaning, and than common woofer, this way had both been saved a large amount of precious materials, did not affect again the operating rate of loud speaker intermediate frequency one band.Therefore, no matter " a kind of speaker system " is realizing on the bass technical method, or aspect the structure of speaker system, all not identical with common medium and low spectrum loudspeaker, it has developed the medium and low spectrum loudspeaker technology.
But, find by further research, " a kind of speaker system " structurally also exists some problems, and the performance that this has affected this systematic function and ability is necessary its Improvement and perfection, in order to further improve performance and the function of system.
Mainly deposit following several problem on " a kind of speaker system " structure, principle and the performance:
One, loudspeaker vibrating body consists of an acoustic compliance element C to the front channel space of transaudient cover tube inlet A, C AComprised in this section space to the magnet thereafter, speaker frame root junction and had uneven path.The loud speaker uneven surface that this section is exposed can stop the sound wave generation that vibration radiation goes out to cause reflection, causes distortion and acoustical energy losses in the sound wave transmittance process.
Loud speaker is the inner surface of acoustic irradiation mouth basin frame supporting surface on every side dorsad, the sound wave that has stopped, reflected the vibrating body radiation is the path of homogeneous radiation backward, stop and make the acoustic waveform distortion distortion that gives off by radiation port on the basin frame, cause the radiated sound loss of energy, reflection causes diffuser vibration distortion.
When sound wave passes through transaudient passage, because whole transaudient sleeve channel is narrow, the acoustic pressure of cone vibrating body institute radiative acoustic wave is little along channel attenuation, in radio cone paper circumference pelvic and the transaudient sleeve channel higher acoustic pressure is arranged, the distortion acoustic pressure of above-mentioned reflection and radiation, the reflection that can closely at once produce higher-strength is disturbed the vibration of vibrating body, the vibration distortion of Caused Vibration body.
That is, exist the vibration distortion of vibrating body, radiative acoustic wave distortion and the passage of radiation port to transmit sound wave distortion totally three kinds of distortions in the whole transaudient sleeve channel.
Two, C AThe porch of element corresponding space, variation has occured in the path area of air stream warp,, in this speaker system, in the front end spaces in loud speaker space, acoustic mass element place to the transaudient sleeve pipe, is implying an acoustic transformer that is.But be connected connection slit between magnet with upper conduction magnetic board owing to there being speaker frame in the passage, and upper conduction magnetic board and magnet upper end surface are with the reflecting surface towards vibrating body, make in this passage by means of these exposed parts formation of loud speaker unsmooth, sound wave is in reflect and cause distortion and acoustical energy losses herein, because these distortions and and the uncertainty of acoustical energy losses, affected C AThe accuracy of the implicit due transform effect of acoustic transformer.
Three, acoustic compliance element C A, the problem of existence causes distortion, affects radiation efficiency, and itself does not have help to the resonance frequency that reduces loud speaker yet, also makes equivalent electric circuit complicated, is unfavorable for simplification and the intuitive analysis of problem.
Four, simply provided the mode of the equal acoustic mass element of a kind of sectional area that is consisted of by two straight pipes in " a kind of speaker system ", and the transaudient passage that consists of between the transaudient passage between two round types that connect together and two plectanes in fact is unequal along the sectional area of channel direction, in order to make its requirement of satisfying transaudient sleeve pipe acoustic mass, between them, need re-construct the acoustic mass element.Therefore, improve between the round type comprehensively and two plectanes between the construction method of acoustic mass element in the transaudient passage that forms.
As seen, in order further to improve the performance in " a kind of speaker system ", must address the above problem.That is, around reducing the speaker frame radiation port, stop reflection and the radiation distortion that causes, and the energy loss of bringing thus, the loud speaker shelf structure be improved; In order to reduce vibration distortion that the passage internal reflection causes and the transmission distortion of passage, need to transform the acoustic radiating passage.Above-mentioned distortion and acoustical energy losses have affected quality and the ability of playback sound.The problems referred to above one, two, three all with transaudient sleeve pipe in acoustic compliance element C AThe space at place is relevant, and C AIn implicit acoustic transformer element, also relevant with the transaudient channel space structure of radiation, therefore, the acoustic compliance element C in also must redesign " a kind of speaker system " transaudient sleeve channel AThe space, and strictly construct this implicit acoustic transformer element, need simultaneously to improve the construction method of acoustic mass element in the passage.
Summary of the invention
Technical problem to be solved by this invention is: the accurate ring pipe composite channel of a kind of pair of basin frame group combination speaker system is provided, solve the dorsad supporting surface between the basin frame radiation port of loud speaker, reflection cone vibrating body backward radiation sound wave and disturb the cone vibration, and the sound wave path of homogeneous radiation backward that stops the radiation of cone vibrating body of the supporting surface between the basin frame radiation port, cause the radiative acoustic wave distortion, in the impact, the problem of low frequency radiation-efficiency; Also solve in the passage in the sound wave transmittance process at C ACone vibration distortion and C that the transmission distortion that reflecting surface in the space at place causes and acoustic reflection cause AIn acoustical energy losses, and by solving C AMiddle distortion and acoustical energy losses and uncertainty thereof improve C AThe accuracy of the transform effect of the interior acoustic transformer that implies; Also solve when internal and external casing is not straight tube the formation problem of the acoustic mass element in the ring pipe passage that between internal and external casing, forms; When the acoustic mass element of accurate ring pipe composite channel internal memory in the accurate ring pipe composite channel of the two basin framves group combination speaker system, utilize this acoustic mass element, can increase the equivalent oscillating mass of loud speaker, reduce the low-frequency resonant frequencies omega of loud speaker 0Especially before and after two basin framves to accurate ring pipe composite channel group combination speaker system, its low-frequency resonant frequency capabilities that reduces loud speaker is more obvious, method is more flexible, and also easier balance of the load at loud speaker two ends under this mode, be conducive to improve the vibration reaction speed, the vibration distortion is also less; Be installed in the accurate ring pipe composite channel group that front and back make progress, can improve the middle pitch of loud speaker; Be installed in the accurate ring pipe composite channel of the external radiation sound in loud speaker front, can also expand the sound field of speaker playback sound, improve directive property and the ante-chamber effect of speaker system radiation sound.By in the ring pipe passage, increasing damping material, can also regulate the damping of speaker system.To overcome the defective of prior art.
The technical solution adopted for the present invention to solve the technical problems is as follows:
The accurate ring pipe composite channel of two basin framves group combination speaker system, comprise cone loudspeaker, it is characterized in that: described cone loudspeaker comprises front basin frame and rear basin frame, comprise that also front end is installed in rear end on the front basin frame and is installed in vibrating body cone on the rear basin frame, the rear end of described rear basin frame is equipped with circular magnet, and front basin frame, rear basin frame, magnet are coaxial with cone; Have the space that keeps the normal vibration of vibrating body cone between the front end of the rear end of front basin frame and rear basin frame, and form the ring radiation opening;
Comprise that also front end is installed on the excircle of circular magnet and second inner sleeve coaxial with circular magnet, also comprise the outer tube coaxial with the second inner sleeve, the front end of outer tube is fixedly mounted on the front basin frame;
Also be included at least one backward intermediate casing is set between outer tube and the second inner sleeve, backward intermediate casing is coaxial with circular magnet; The front end of backward intermediate casing is close peak swing place with vibrating the backward correspondence position of cone as far as possible; Backward intermediate casing and outer tube and the second inner sleeve are connected to each other; Form at least unit, the backward circular passage of twice between backward intermediate casing, outer tube and the second inner sleeve.
The the first round table-like inner sleeve that also comprises one section axle centered by the axes O of vibrating body cone, the front end of the first inner sleeve is airtight to be connected on the rear basin frame, the first inner sleeve rear end aligns with the second inner sleeve front end and is connected, and is smooth transition between the first inner sleeve and the second inner sleeve.
In the outer wall of the second inner sleeve rear circular passage unit to intermediate casing between adjacent with the second inner sleeve, several are installed and are connected block piece, perhaps in the inwall of the outer tube rear circular passage unit to intermediate casing between adjacent with outer tube, several are installed and are connected block piece, several perhaps all are installed in each unit, backward circular passage connect block piece, the connection block piece is solid or is obturator; Adjacent two connect between the block pieces for moving towards consistent transaudient passage with backward circular passage, and each transaudient passage has consistent cross-sectional area along its transaudient direction in the unit, same backward circular passage.
The sidewall front end of described front basin frame comprises also that with flanging the rear end is installed on the described flanging and the front outer tube coaxial with the vibrating body cone, is provided with the front inner sleeve coaxial with front outer tube in described front outer tube inside; Described front inner sleeve and front outer tube are connected to each other; Form forward direction ring pipe passage between the outer wall of front inner sleeve and the inwall of front outer tube.
The present invention can also comprise at least one forward direction intermediate casing between described front outer tube and front inner sleeve, and the forward direction intermediate casing is coaxial with the vibration cone; Peak swing place close and vibrating body cone forward direction correspondence position tries one's best in the rear end of forward direction intermediate casing; Forward direction intermediate casing and front inner sleeve and front outer tube are connected to each other; Form at least bipassage ring shape channel unit between forward direction intermediate casing, front inner sleeve and the front outer tube.
In forward direction ring pipe passage, several block pieces are installed; Block piece is solid or is obturator, is the trend transaudient passage consistent with forward direction ring pipe passage between adjacent two block pieces, and each transaudient passage has consistent cross-sectional area along its transaudient direction.
The present invention can also be equipped with several block pieces in the unit, circular passage between the outer wall of front inner sleeve and the forward direction intermediate casing adjacent with front inner sleeve, perhaps in the unit, circular passage between the inwall of front outer tube and the forward direction intermediate casing adjacent with front outer tube several block pieces are installed, perhaps in each unit, circular passage several block pieces are installed all; Block piece is solid or is obturator, is the trend transaudient passage consistent with forward direction ring pipe channel unit between adjacent two block pieces, and each transaudient passage has consistent cross-sectional area along its transaudient direction in the unit, same circular passage.
The retaining piece that also comprises one section axle centered by the axes O of vibrating body cone; The front end of retaining piece aligns with front inner sleeve rear end and is connected, and the outer wall of retaining piece is even surface; Be smooth transition between retaining piece and the front inner sleeve; The rear end of described retaining piece is positioned at the place ahead and as far as possible close this peak swing place at vibrating body cone peak swing place.
Good effect of the present invention is:
The accurate ring pipe composite channel of two basin framves group combination speaker system, to be combined to form on the basis of the accurate ring pipe composite channel of two basin framves speaker system, the accurate ring pipe composite channel of two basin framves speaker systems are two basin frame loud speakers be installed in its backward accurate ring pipe composite channel is combined formation.Two basin frame loud speakers, two front and back basin framves that directly are not connected are arranged, the fixing front and rear part of diffuser respectively, the sound wave of diffuser vibrating body backward radiation gives off this mode by the ring radiation opening between the basin frame of front and back, there has not been the basin frame area between the common basin frame radiation port, greatly reduce speaker frame to the stopping of the sound wave of cone vibrating body backward radiation, improved the fidelity of loud speaker radiative acoustic wave, be conducive to improve the radiation efficiency of loud speaker medium and low frequency.In essence, accurate ring pipe composite channel is a ring pipe acoustic transformer element that is formed by an annular space, a ring pipe acoustic transformer combination of elements that forms with a ring pipe passage consists of, accurate ring pipe composite channel can be installed on the forward direction of two basin frame loud speakers, as the accurate ring pipe composite channel of the two basin framves of forward direction, perhaps be installed on loud speaker backward, consist of the accurate ring pipe composite channel of backward pair of basin frame, also can be installed in the front and back of two basin frame loud speakers upwards, use to the accurate ring pipe composite channel of two basin framves before and after consisting of.
One group of accurate ring pipe composite channel connects together, just form accurate ring pipe composite channel group, be that accurate ring pipe composite channel group is the one group of ring pipe acoustic transformer element that is formed by one group of annular space unit, the one group of ring pipe acoustic transformer combination of elements that forms with one group of ring pipe channel unit consists of, wherein, the annular space that forms between the internal and external casing in the accurate ring pipe composite channel has been cut apart in each annular space unitary space, and the ring pipe acoustic transformer combination of elements that the ring pipe acoustic transformer element that each annular space unit forms and same unit annular tube passage form consists of accurate ring pipe composite channel.Accurate ring pipe composite channel group can be installed on the forward direction of two basin frame loud speakers, as the accurate ring pipe composite channel of the two basin framves of forward direction group, perhaps be installed on loud speaker backward, consist of the accurate ring pipe composite channel of backward pair of basin frame group, also can be installed in the front and back of two basin frame loud speakers upwards, use to the accurate ring pipe composite channel of two basin framves group before and after consisting of.Accurate ring pipe composite channel group can be installed in the front and back end of two basin frame loud speakers among the present invention, uses to the accurate ring pipe composite channel of two basin framves group before and after consisting of.The different accurate ring pipe composite channel that makes progress before and after two basin frame loud speakers or the multiple combination between accurate ring pipe composite channel group consist of the accurate ring pipe composite channel of two basin framves group combination speaker system.
Accurate ring pipe composite channel group is more flexible than accurate ring pipe composite channel, several passages that multi-functional transmission sound is arranged, in the common accurate ring pipe composite channel group, each passage that is consisted of by acoustic transformer element and acoustic transformer element, but, when the no-load voltage ratio of the acoustic transformer of some passage is 1, namely, when the import and export constant area of these passages is constant, the passage that these passages just just are made of the acoustic transformer element, if this moment, these passages were consistent with vibrating body radiated sound wave line of propagation, what then pass through in these passages is some sound waves consistent with vibrating body radiative acoustic wave waveform, being similar to what pass through in the sound pipe is plane wave, and this has correspondingly improved the radiation efficiency of loud speaker.
Because the operation principle of each channel unit in the accurate ring pipe composite channel group, identical with the situation of accurate ring pipe composite channel, and with regard to reducing loud speaker low-frequency resonant frequency, in the accurate ring pipe composite channel of the two basin framves combination speaker system, the operation principle of the radiant transfer of sound wave in the accurate ring pipe composite channel of forward direction, with sound wave rear in the accurate ring pipe composite channel operation principle of radiant transfer identical, therefore, operation principle is described sometimes as an example of backward accurate ring pipe composite channel example.
1, transforms the basin shelf structure that loud speaker affects acoustic radiation, minimizing basin frame internal surface area is to the reflection of cone vibration radiation sound wave and the cone vibration distortion that causes thus, and reduce the radiation distortion that sound wave produces because of distortion by the radiation port place, improve fidelity and the radiation efficiency of loud speaker and radiation sound.
Loud speaker in the accurate ring pipe composite channel speaker system can be a medium and low spectrum loudspeaker that improves the loud speaker shelf structure, also can be a common medium and low spectrum loudspeaker.Usually, accurate transmission sound passage can critically transmit sound wave.But when common medium and low spectrum loudspeaker consists of accurate ring pipe composite channel speaker system, the sound wave of diffuser vibrating body radiation will enter transaudient passage by the radiation port on the speaker frame lateral support face, and the remainder outside the radiation port on the basin frame supporting surface, can produce blocking reflected to radiated wave, and because of its position very near apart from vibrating body, reflected wave can disturb the vibrating body normal vibration immediately, cause the vibration distortion, and cone towards periphery the sound wave of homogeneous radiation because of the stopping of basin frame, through the acoustic waveform of radiation port after out gross distortion.Therefore, when need further improve the performance of " a kind of speaker system " radiant transfer sound, do necessary improvement to speaker frame, this also help improve speaker operation in, acoustic radiating efficient during low frequency.
Its major programme has following three kinds:
(1), the connection supporting surface part between the cancellation speaker frame radiation port, it is a ring shape radiation opening that the ventional loudspeakers radiation port is communicated with.
(2), adopt a plurality of large bar shaped radiation port and thin supporting surface or narrow thick brace rod basin shelf structure.
(3), adopt the basin shelf structure of large mesh radiation port and fine-structure mesh limit supporting surface or narrow thick brace rod.
Scheme (1) is a kind of the most thoroughly improved procedure, and this moment, the basin frame of loud speaker minute was broken into as two up and down basin framves, set up in addition the connection between the two parts that are disconnected, with fixing diffuser.
Two basin frame ring radiation opening loud speakers are combined with accurate ring pipe composite channel, consist of two backward accurate ring pipe composite channel speaker systems of basin frame, two basin shelf structures have greatly reduced stopping and reflect radiative acoustic wave, reduced the reflection of basin frame and stopped distortion and the acoustical energy losses of generation, also be conducive to speaker system produce larger, more fidelity in, low-frequency sound.Ring radiation opening loud speaker has not only enlarged the discharge area of radiation channel, make more fidelity of the acoustic waveform that gives off, this takes a firm foundation for improving radiation efficiency, if import ripple that the sound wave of accurate ring pipe composite channel the is consistent face that shakes into by radiation space, then can improve the radiation efficiency of speaker system intermediate frequency.This way also makes vibration cone surface loading even, is conducive to reduce the vibration distortion, and vibration more has dynamics during low frequency, more resembles an accurate stiff piston, and better bass performance is arranged.
To accurate ring pipe composite channel combination speaker system, the load at loud speaker two ends is easier balance also, is conducive to improve the vibration reaction speed, vibrates distortion also less before and after the two basin framves that consist of with this loud speaker, and sound is fidelity more.
2, accurate ring pipe acoustic transformer element of structure has improved environment in the passage, has greatly reduced distortion and acoustical energy losses that this section passage stops, reflects and cause sound wave, and system class is simplified than circuit.
In " a kind of speaker system " passage two place's acoustical energy losses are arranged, one in channel space, is hindered by object acoustic reflection is produced; One on the tube wall of passage, by the pipe friction generation of air and passage.The acoustic compliance element C that consists of to the space that is limited by outer tube of speaker magnet front behind the speaker frame in the passage A, they be the element of a two-port, and the area of its input port, delivery outlet is different usually, on this meaning, and C AThe space is identical with an acoustic transformer component space, i.e. C AIn implying an acoustic transformer.
But at C AIn the space at place, expose like this some uneven surfaces of magnet and speaker frame root junction, when sound wave passes through this zone, can reflect sound energy consumption, and because C these local generations ANarrow space, reflection can form than strong jamming vibrating body, affects loudspeaker vibration, causes distortion and the acoustical energy losses of the vibration of vibrating body cone and radiant transfer process, on this one side, C ADifferent again from acoustic transformer.And because C AWithout any positive effect, in equivalent electric circuit, it also makes complex circuit to " a kind of speaker system " reducing work frequency, is not easy to analyze.Acoustic compliance element C in the transaudient sleeve channel AUneven surface in the space, place has directly affected the efficient of medium and low frequency radiation and the fidelity of sound to transmitting the blocking reflected of sound wave, and it is uneven that the amplitude-frequency characteristic of intermediate frequency becomes.
Therefore, in the accurate ring pipe composite channel of the two basin framves group combination speaker system, by increasing by the first inner sleeve, between the first inner sleeve and outer tube, make up a smooth annular space and formed the ring pipe acoustic transformer, replaced " a kind of speaker system " acoustic compliance element C ATransaudient sleeve channel in " a kind of speaker system ", because the inner brilliance of accurate ring pipe composite channel, the distortion and the energy loss that do not have reflecting surface to cause, can greatly improve the amplitude-frequency characteristic of the medium and low frequency of speaker system output, so that amplitude-frequency characteristic is more level and smooth.The ring radiation opening of two basin frame loud speakers is from more this has guaranteed that air is incompressible in the accurate ring pipe passage, and volume velocity does not change, so can ignore the acoustic compliance value of annular space under the certain condition.In the analogy line map, thoroughly eliminated like this acoustic compliance element C in " a kind of speaker system " AImpact, it is more succinct, clear and definite that the analogy circuit becomes.Accurate ring pipe composite channel internal structure is regular, and major parameter wherein is programmable very accurate, is conducive to industrial standardization production.
Common acoustic transformer is to import and export in the different hollow tube of area at one to form, and the acoustic transformer in the accurate ring pipe composite channel of the present invention speaker system is to be made of two annular spaces between by all means, is different from general constructive method.
3, the formation method of the acoustic mass element of other several primary structures in the transaudient sleeve channel in perfect " a kind of speaker system ", the structural change of accurate ring pipe composite channel speaker system is many, and usage is more flexible.
In " a kind of speaker system ", when the sound pipe that consists of transaudient passage is shaped as expand outwardly round table-like, will change along the annulus area of channel direction, the acoustic mass element between this moment internal and external casing will not exist.For so that still have the acoustic mass element in the ring pipe passage this moment, must be in channel interior along channel direction, re-construct out sectional area just as the space, as the acoustic mass element.
Still the backward accurate ring pipe composite channel in the backward accurate ring pipe composite channel group speaker system is as example.The basic comprising mode of the ring pipe acoustic mass element in the accurate ring pipe composite channel of the two basin framves this moment group combination speaker system is by forming one section straight circular air duct that sectional area is even, identical between the second inner sleeve and the outer tube.For other needs, the also ring pipe passage of truncated conical shape, but sectional area is different everywhere in this structure space, can not directly form an acoustic mass element.Therefore, in accurate ring pipe composite channel speaker system, also further expand, perfect when passage be a round table-like ring pipe passage, and even the table top of this round table-like ring pipe passage is further expanded so that the inside and outside tube wall of passage is expanded to the plan position approach, become inside and outside two plane plectanes, be round table-like ring pipe passage when becoming two passages between the plectane of plane, the generation type of interchannel acoustic mass element.These above-mentioned variations have guaranteed accurate ring pipe composite channel shape and have used more versatile and flexible.
For this reason, the accurate ring pipe composite channel of the two basin framves of the present invention group combination speaker system, by in the sound passage, increasing the trend some group connection block pieces consistent with the ring pipe passage rear, every group of connection block piece is solid or is obturator, connect the new transaudient passage of formation between the block piece in two adjacent groups, and make each transaudient passage have consistent cross-sectional area along its trend, even round table-like sound pipe has the different angles that expands outwardly, between two pipes in the formed annular space, can be simple, construct neatly the acoustic mass element, to satisfy the requirement of reducing work frequency.Because the shape of accurate ring pipe composite channel group depends on the shape of each accurate ring pipe composite channel, therefore each channel unit acoustic mass element in the accurate ring pipe composite channel group, just definite by the structure of the acoustic mass of each accurate ring pipe composite channel.
Equally, when round table-like ring pipe passage becomes two passages between the plectane of plane, between two plectanes, also can re-construct in this way the acoustic mass element.
After taking these measures, expand, perfect other several main composition modes of acoustic mass element in the passage, fundamentally guaranteed all the time sound mass elements existence in the passage, this has just guaranteed the effect of the reduction power resonance frequency of accurate ring pipe composite channel structure of loudspeaker system, and it is more flexible, free that channel shape is selected, and makes its structure that widely adaptability be arranged.
Especially the accurate ring pipe composite channel of two basin framves group combination speaker system, can utilize simultaneously ring pipe passage on former and later two directions or the acoustic mass in the passage group, farthest improve same the shake quality of acoustic mass element equivalent action on loud speaker, further reduce the low-frequency resonant frequency of loud speaker.
The two basin framves precision ring pipe composite channel group combination speaker system that 4, the accurate ring pipe composite channel of the two basin framves of forward direction group is arranged has further enlarged the function of system
As everyone knows, when sound passed through thin sound pipe, the sound wave in the thin sound pipe can be regarded plane wave as.Between internal and external casing, increase intermediate casing, form accurate ring pipe composite channel group, between the adjacent intermediate casing and the ring pipe channel unit that forms between outer tube and the adjacent intermediate casing, even wherein the cross-sectional area of any one group of ring pipe channel unit all becomes less, when the sound wave that loud speaker gives off becomes thinner narrow ring pipe channel unit by these, sound wave in these accurate ring pipe composite channel unit can be regarded plane wave as.
The rear end of the annular center-aisle unit in the accurate ring pipe composite channel group that is installed in the external radiation sound in loud speaker front, when as far as possible maximum near the loudspeaker vibrating body amplitude and the correspondence position of this unit, circular passage, the sound wave that gives off of the circular vibrating body of loud speaker then, by each channel unit to external radiation, the equivalence vibration area of controlling in the total annulus area of each channel unit and a certain frequency range of loud speaker equates, so that the area before and after in each accurate ring pipe composite channel unit does not change, and make each accurate ring pipe composite channel unit as far as possible consistent with the radiated sound wave trajectory, the ripple of the sound wave that the vibrating body that then passes through in each accurate ring pipe composite channel unit the gives off face that shakes is substantially constant, be similar to and pass through plane wave in the hollow tube, this can improve the radiation efficiency of the especially intermediate frequency of loud speaker.
Be installed in the accurate ring pipe composite channel group of the external radiation sound in loud speaker front, can also expand the sound field of speaker playback sound, improve directive property and the ante-chamber effect of speaker system radiation sound.
Usually, the sound of loud speaker radiation is directive, and this is the so-called directivity of loudspeaker, and it is determined by design principle, structure and the characteristic of itself of loud speaker.In the accurate ring pipe composite channel of the forward direction group speaker system, the sound that the loudspeaker vibration face gives off, give off by each annular mouth of pipe, therefore, by adjusting diameter and the direction of the outlet in the ring pipe radiation channel, can change the direction of cone loudspeaker radiation sound, affect its directive property, regulate the sound field width of its radiative acoustic wave.
The ante-chamber effect usually occurs in a bit of scope in the positive taper basin front of medium and low frequency loud speaker, be installed in the accurate ring pipe composite channel of the external radiation sound in loud speaker front or the conical retaining piece in the passage group, the medium and low frequency sound wave of cutting apart and having stopped radiation everywhere on the loud speaker taper cone face forms the approach of interference effect at ante-chamber, therefore greatly improve the ante-chamber effect.
5, can with the accurate ring pipe composite channel of a two basin framves group combination speaker system, directly there be easily the audio amplifier of casing to use as one.Imagination strengthens the backward annular space of accurate ring pipe composite channel combination speaker system, and the accurate ring pipe composite channel of two basin framves group combination speaker system class are similar to the speaker system of phase inverting box structure.
Again for example, before and after the two basin framves in accurate ring pipe composite channel group combination speaker system, the accurate ring pipe composite channel of forward direction or passage group are used for improving mid frequency radiated efficient, backward accurate ring pipe composite channel group is used for improving low frequency radiation-efficiency, and imagine backward annular space and strengthen, in being similar to, phase inverting box structure of loudspeaker system that low frequency efficiency is higher.
6, in the ring pipe passage or channel exit increase damping material, in order to the damping of the accurate ring pipe composite channel of the two basin framves of flexible group combination speaker system.
Damping situation in " a kind of speaker system " depends on the damping of loud speaker, the impact of sound passage and three the main aspects of air in the casing, and it is very not convenient to regulate, and this has limited the Application Range of loud speaker.In order to utilize more neatly existing height damping value loud speaker, the present invention can be in the ring pipe passage or its port of export, or in some ring pipe channel unit or its port of export increase damping material, in order to the in case of necessity damping of regulating system.
Description of drawings:
Fig. 1 is the structural representation of two basin frame loud speakers.
Fig. 2 two basin framves front and back that to be backward accurate ring pipe composite channel group be combined with the accurate ring pipe composite channel of forward direction are to accurate ring pipe composite channel group combination speaker system configuration schematic diagram.
Fig. 3 two basin framves front and back that to be backward accurate ring pipe composite channel group be combined with the accurate ring pipe composite channel of forward direction group are to accurate ring pipe composite channel group combination speaker system configuration schematic diagram.
Embodiment
Further describe the present invention below in conjunction with accompanying drawing and instantiation.
As shown in Figure 1, the present invention includes cone loudspeaker 1, described cone loudspeaker 1 comprises front basin frame 1-4 and rear basin frame 1-2, between front basin frame 1-4 and the rear basin frame 1-2, form the ring radiation mouth, comprise that also front end is installed in the upper rear end of front basin frame 1-4 and is installed in vibrating body cone 1-1 on the rear basin frame 1-2 chassis, the sidewall front end of described front basin frame 1-4 is with flanging, and the rear end of described rear basin frame 1-2 is equipped with and connects the up and down circular magnet 1-3 of magnetic conductive board.Has the space that keeps vibrating body cone 1-1 normal vibration between front basin frame 1-4 and the rear basin frame 1-2.Has the ring radiation opening between front basin frame 1-4 and the rear basin frame 1-2.Vibrating body cone 1-1 is coaxial with circular magnet 1-3.
Comprise that also front end is installed on the excircle of circular magnet 1-3 and second inner sleeve 2 coaxial with circular magnet 1-3; Also comprise the outer tube 3 coaxial with the second inner sleeve 2, the front end of outer tube 3 is fixedly mounted on the front basin frame 1-4; Be connected to each other between outer tube 3 and the second inner sleeve 2.
To intermediate casing 15, backward intermediate casing 15 is coaxial with circular magnet 1-3 after arranging at least one between outer tube 3 and the second inner sleeve 2; The front end of backward intermediate casing 15 is positioned at the backward peak swing place that vibrates cone 1-2 correspondence position before also as far as possible near the peak swing place; Be connected to each other between backward intermediate casing 15, outer tube 3 and the second inner sleeve 2; Form at least backward circular passage of twice unit 4-1 between backward intermediate casing 15, outer tube 3 and the second inner sleeve 2;
The the first round table-like inner sleeve 5 that also comprises one section axle centered by vibrating body cone 1-1 axes O, the airtight rear end root of rear basin frame 1-2 that is connected to of the front end of the first inner sleeve 5 is between the radiation port back edge, the first inner sleeve 5 rear ends align with the second inner sleeve 2 front ends and are connected, and form level and smooth round table-like transition face between the first inner sleeve 5 front end installation places and the second inner sleeve 2.Be smooth transition between the first inner sleeve 5 and the second inner sleeve 2.The first inner sleeve 5 can also be smeared with the cream pledge and smooth to corresponding position, solidifies rear formation.
In the outer wall of the second inner sleeve 2 rear circular passage unit 4-1 to intermediate casing 15 between adjacent with the second inner sleeve 2, several are installed and are connected block piece 13, perhaps in adjacent rear unit, the circular passage 4-1 between intermediate casing 15 of the inwall of outer tube 3 and outer tube 3, several are installed and are connected block piece 13, several perhaps all are installed in each backward circular passage unit 4-1 connect block piece 13, connection block piece 13 is solid or is obturator; Adjacent two connect between the block pieces 13 for moving towards consistent transaudient passage with backward circular passage 4, and each transaudient passage has consistent cross-sectional area along its transaudient direction in the same backward circular passage unit 4-1.
Crossing the section of described axes O and the intersecting lens between the second inner sleeve 2 one side outer walls is L1, and the intersecting lens with L1 the same side between described section and outer tube 3 inwalls is L2; The intersecting lens with L1 the same side between the inwall of described section and backward forward direction intermediate casing 14 and the outer wall is respectively L3, L4; L1, L2, L3, L4 can be parallel to each other.
Be backward annular space 10 between the backward forward direction intermediate casing 14 of the first inner sleeve 5 peripheries, the second inner sleeve 2 and the outer tube 3; The length of backward annular space 10 and described backward circular passage unit 4-1 all be less than or equal to speaker system the low-frequency resonant wave length of sound 1/10.
Angle α between L3, L4 and the axes O=90 °, the second inner sleeve 2 and outer tube 3 for annular flat tabular or the first inner sleeve 5, the second inner sleeve 2 and outer tube 3 to be annular flat tabular.
In the backward ring pipe channel unit 4-1 damping material is installed.
As shown in Figure 2, the present invention comprises that also the rear end is installed on the flanging of front basin frame 1-4 and the front outer tube 7 coaxial with vibrating body cone 1-1, is provided with the front inner sleeve 8 coaxial with front outer tube 7 in described front outer tube 7.
Described front outer tube 8 be connected inner sleeve 7 by bracing frame connection fastened to each other.Form forward direction ring pipe passage 6 between front outer tube 8 and the front inner sleeve 7.
The cone shape barriers 9 that also comprises one section axle centered by vibrating body cone 1-1 axes O, barriers 9 is coniform or round table-like, the rear end of barriers 9 is conical end or is the little table top of round platform, and this little table top was plane or cambered surface when the rear end of barriers 9 was the little table top of round platform; The rear end of barriers 9 is positioned at the place ahead at vibrating body cone 1-1 maximum central amplitude place and near this peak swing place, the front end of barriers 9 aligns with front inner sleeve 8 rear ends and is connected, and the outer wall of barriers 9 is even surface; Be smooth transition between barriers 9 and the front inner sleeve 8.
Crossing the section of described axes O and the intersecting lens between the front inner sleeve 8 one side outer walls is L5, and the intersecting lens with L5 the same side between described section and front outer tube 7 inwalls is L6; L5, L6 can be parallel to each other.
Angle between L5, L6 and the axes O is β, and the angular range of β is 0 °≤β≤90 °, when β 1＜β≤90 °, is equipped with in forward direction ring pipe passage 6 with forward direction ring pipe passage 6 and moves towards consistent several block pieces; Block piece is solid or is obturator, is transaudient passage between adjacent two block pieces, and each transaudient passage has consistent cross-sectional area along its transaudient direction.Definite mode of β 1 is as follows: when β＜β 1, forward direction ring pipe passage 6 front and back cross-sectional areas are basically identical, and forward direction ring pipe passage 6 can be used as the acoustic mass element substantially.
Be annular space 11 between front outer tube 7 and the retaining piece 9, annular space 11 and described ring pipe passage 6 are configured for the accurate ring pipe composite channel of forward direction of radiant transfer loud speaker sound wave dorsad jointly.
The length of described ring pipe passage 6 and described annular space 11 all be less than or equal to the speaker system of passing through in this tube passage the low-frequency resonant wave length of sound 1/10.
Angle β between L5, L6 and the axes O=90 °, front inner sleeve 8 and outer tube 7 are that annular flat is tabular.
In the forward direction ring pipe passage 6 damping material is installed.
Such as Fig. 3, also comprise at least one forward direction intermediate casing 14 between described front outer tube 7 and front inner sleeve 8, forward direction intermediate casing 14 is coaxial with vibration cone 1-2; Peak swing place close and vibrating body cone 1-1 forward direction correspondence position tries one's best in the rear end of forward direction intermediate casing 14; Forward direction intermediate casing 14 is connected to each other with front inner sleeve 8 and front outer tube 7; Form at least bipassage ring shape channel unit 6-1 between forward direction intermediate casing 14, front inner sleeve 8 and the front outer tube 7.
Crossing the section of described axes O and the intersecting lens between the front inner sleeve 8 one side outer walls is L5, and the intersecting lens with L5 the same side between described section and front outer tube 7 inwalls is L6; The intersecting lens with L5 the same side between the inwall of described section and forward direction intermediate casing 14 and the outer wall is respectively L7, L8; L5, L6, L7, L8 can be parallel to each other.
Angle between L5, L6, L7, L8 and the axes O is β, the angular range of β is 0 °≤β≤90 °, when β 1＜β≤90 °, in unit, the circular passage 6-1 between the outer wall of front inner sleeve 8 and the forward direction intermediate casing 14 adjacent with front inner sleeve 8 several block pieces are installed, perhaps in unit, the circular passage 6-1 between the inwall of front outer tube 7 and the forward direction intermediate casing 14 adjacent with front outer tube 7 several block pieces are installed, perhaps in each unit, circular passage 6-1 several block pieces are installed all; Block piece is solid or is obturator, is the trend transaudient passage consistent with forward direction ring pipe channel unit 6-1 between adjacent two block pieces, and each transaudient passage has consistent cross-sectional area along its transaudient direction in the unit 6-1 of same circular passage.
Definite mode of β 1 is as follows: when β＜β 1, forward direction circular passage 6 front and back cross-sectional areas are basically identical, and forward direction circular passage 6 can be used as the acoustic mass element substantially.
Be forward direction annular space 11 between the forward direction intermediate casing 14 of barriers 9 peripheries, the front outer tube 7; The length of forward direction annular space 11 and described forward direction circular passage unit 6-1 all be less than or equal to speaker system the low-frequency resonant wave length of sound 1/10.
Angle β between L7, L8, L5, L6 and the axes O=90 °, forward direction intermediate casing 14, front inner sleeve 8 and outer tube 7 are that annular flat is tabular.(being confined to the inclination angle of diffuser)
The correlation computations of the accurate ring pipe composite channel of two basin framves group combination speaker system:
Take backward accurate ring pipe composite channel speaker system as example.In the accurate ring pipe composite channel of the two basin framves group combination speaker system, the sound wave that the loudspeaker vibrating body backward radiation goes out is exported by the ring radiation opening on the speaker frame, enter backward annular space and output to outside the passage through the port of export of backward ring pipe passage, therefore the air in the passage becomes the part of loud speaker, in arbitrary moment, the air in the passage becomes the most direct load of vibrating body.Because backward accurate ring pipe composite channel is narrow short, when speaker operation during in low frequency, the acoustic pressure that vibrating body produces is maintained a period of time in the passage of acoustic mass element place, therefore acoustic pressure raises in the passage, the interior air load of passage this moment is strengthened the reaction of loudspeaker vibrating body, and backward accurate ring pipe composite channel speaker system has produced stronger acoustic radiation.
Accurate ring pipe composite channel is to be made of some short tubes for the bass wavelength length of will resetting.During design; usually the cross-sectional area of the import and export of annular space passage is different; the cross-sectional area that the ring pipe passage is imported and exported is identical; the backward accurate ring pipe composite channel speaker system of this moment; when speaker operation during in low frequency; backward annular space passage looping pipe acoustic transformer element, backward ring pipe passage looping pipe acoustic mass element.
Ring pipe acoustic transformer herein has two effects, one, acoustic transformer can be by the mechanical impedance at its its two ends of no-load voltage ratio change sound, be that conversion acoustic mass element acts on the mechanical impedance on the loud speaker, two, pass through the no-load voltage ratio amplification of acoustic transformer, the acoustic mass equivalence of acoustic mass element is increased to loud speaker one end, increase the total equivalent mass of loud speaker, this can reduce the low frequency power resonance frequency of loud speaker, improves the loud speaker low frequency radiation-efficiency.For " a kind of speaker system ", owing to making acoustic transformer with this smooth ring pipe passage, greatly reduced sound wave by its inner energy loss, so that the acoustic transformer of this structure can be done very accurately, this also is the implication of accurate two words in the accurate ring pipe composite channel of the present invention speaker system title.
In the backward accurate ring pipe composite channel speaker system, when speaker operation during in low frequency, because passage is the acoustic mass element, air in its passage is not compressed, therefore ring pipe acoustic transformer element has identical volume velocity with ring pipe acoustic mass element, the loud speaker radiative acoustic wave can be without hindrance, lossless by behind the first passage, and in the air outside passage is delivered to passage, but this acoustic mass only just exists during in low frequency in speaker operation, in case breaking away from low frequency, loud speaker enters the intermediate frequency regional work, this acoustic mass also just disappears, and visible loudspeaker vibration physical efficiency normally has bass area to turn to treble work like a cork.
In the backward accurate ring pipe composite channel speaker system, because backward annular space has identical coefficient of friction with backward ring pipe passage, the acoustical energy losses in the backward accurate ring pipe composite channel is become a common acoustic loss element R by equivalence A2(the inner air tube motion forms with the viscous friction of tube wall).As seen backward accurate ring pipe composite channel speaker system, the transaudient passage of its radiation is one and comprises acoustic transformer, acoustic mass element M A2, acoustic loss element R A2The complex sound structure.
In admittance type analogy substitutional connection, ring pipe acoustic transformer element and ring pipe acoustic mass element have the mechanical impedance change action at identical volume velocity and acoustic transformer two ends, be presented as the parallel connection relation of two elements and the no-load voltage ratio of acoustic transformer, the no-load voltage ratio S of acoustic transformer 2/ S 1, reflected that this is connected on the mechanical impedance change action of the acoustic transformer between the loud speaker harmony mass elements, also will further increase same the shake quality of acoustic mass equivalent action on loudspeaker vibrating body in the passage.
The relevant calculation of backward accurate ring pipe composite channel speaker system is as follows:
If outer tube is area is S 1Round straight tube, S simultaneously 1Effective vibrating body area when also being the loud speaker low frequency.Passage is circular straight channel, and area is S 2, length is for L 2Then area is S 2The quality .M of passage Air MA0=S 2* L 2* ρ 0, acoustic mass M A0=M MA0/ S 2 2=ρ 0L 2/ S 2, the air quality of viewability channel, acoustic mass all are directly proportional namely with the length of this passage, and acoustic mass and S in it 2Area is inversely proportional to, its air quality and S 2Area is directly proportional, and the characteristics of Here it is ring pipe acoustic mass element this means that the acoustic mass in the long-pending ring pipe passage of a small cross sections is larger.
M A0Normalize to the S of loud speaker 1The equivalent mass of face is (S 1/ S 2) 2M A0, S wherein 1/ S 2No-load voltage ratio for the ring pipe acoustic transformer.Common S 1Greater than S 2There is the acoustic mass element when time more easily guarantees the passage medium and low frequency, makes S in therefore using 1Greater than S 2, (S at this moment 1/ S 2) 2M A0Greater than M A0That is the equivalent sound quality that, transforms to the passage on the loudspeaker vibrating body through the annular space acoustic transformer has improved greatly.
In the situation that do not consider the accurate ring pipe composite channel impact of forward direction to accurate ring pipe composite channel impact after only considering, by speaker system low-frequency resonant formula ω 0=as can be known, the total equivalent mass M of electrodynamic loudspeaker in backward accurate ring pipe composite channel this moment MEquivalence value (the S that comprises the acoustic mass of cone basin equivalent mass, voice coil loudspeaker voice coil equivalent mass, the positive same quality of shaking of vibrating body, the back side same shake quality and backward ring pipe acoustic mass element 1/ S 2) 2M A0, according to the characteristics of vibrating body radiation in sound pipe, comprise the loud speaker same mass M of shaking dorsad in the whole sound pipe MR2, as long as in the practical application, accurate ring pipe composite channel is a jitty, therefore the M of the acoustic mass of backward ring pipe acoustic mass passage A2Equivalent mass (S 1/ S 2) 2M A0Greater than the loudspeaker vibrating body same mass M of shaking dorsad MR2, total equivalent M of backward accurate ring pipe composite channel speaker system MTo increase.The former loud speaker this moment same mass M of shaking dorsad MR2Be included in (S 1/ S 2) 2M A0In, at this moment namely, the total equivalent oscillating mass M of backward accurate ring pipe composite channel speaker system M=M 1+ M 2+ M MR1+ (S 1/ S 2) 2M A0, the total equivalent oscillating mass M of loud speaker when not having accurate ring sleeve M=M 1+ M 2+ M MR1+ M MR2, as seen, in the backward accurate ring pipe composite channel speaker system because having increased (a S 1/ S 2) 2M A0Be worth, make the low-frequency resonant frequencies omega of loud speaker 0Diminish, system has produced the resonance frequency of lower power, can give off the more sound of low frequency.During this usage, the situation of backward accurate ring pipe composite channel group kind is identical with principle in the backward accurate ring pipe composite channel.
In the accurate ring pipe composite channel of the two basin framves group combination speaker system, the radiant transfer of sound wave in the accurate ring pipe composite channel of forward direction is identical in the operation principle of rear radiant transfer in accurate ring pipe composite channel with sound wave.Therefore, above-mentioned computational methods and conclusion are not only applicable to backward accurate ring pipe composite channel speaker system, be equally applicable to the accurate ring pipe composite channel of forward direction speaker system, namely, the acoustic mass element that ring pipe passage in the accurate ring pipe composite channel of forward direction consists of can make loud speaker increase (a S equally 1/ S 2) 2M A0Value, this also can be so that make the low-frequency resonant frequencies omega of loud speaker 0Diminish, system produces the resonance frequency of lower power, can give off the more sound of low frequency.During this usage, the situation in the accurate ring pipe composite channel of the forward direction group is identical with principle in the accurate ring pipe composite channel of forward direction.

Claims (10)

1. the accurate ring pipe composite channel of two basin framves group combination speaker system, comprise cone loudspeaker (1), it is characterized in that: described cone loudspeaker (1) comprises front basin frame (1-4) and rear basin frame (1-2), comprise that also front end is installed in the upper rear end of front basin frame (1-4) and is installed in vibrating body cone (1-1) on the rear basin frame (1-2), the rear end of described rear basin frame (1-2) is equipped with circular magnet (1-3), and front basin frame (1-4), rear basin frame (1-2), magnet (1-3) are coaxial with cone (1-1); Have the space that keeps vibrating body cone (1-1) normal vibration between the front end of the rear end of front basin frame (1-4) and rear basin frame (1-2), and form the ring radiation opening;
Comprise that also front end is installed on the excircle of circular magnet (1-3) and second inner sleeve (2) coaxial with circular magnet (1-3), also comprise the outer tube (3) coaxial with the second inner sleeve (2), the front end of outer tube (3) is fixedly mounted on the front basin frame (1-4);
Also be included between outer tube (3) and the second inner sleeve (2) at least one backward intermediate casing (15) is set, backward intermediate casing (15) is coaxial with circular magnet (1-3); The front end of backward intermediate casing (15) is close peak swing place with vibrating the backward correspondence position of cone (1-2) as far as possible; Backward intermediate casing (15) is connected to each other with outer tube (3) and the second inner sleeve (2); Form at least unit, the backward circular passage of twice (4-1) between backward intermediate casing (15), outer tube (3) and the second inner sleeve (2).
2. the accurate ring pipe composite channel of according to claim 1 pair of basin frame group combination speaker system, it is characterized in that: round table-like the first inner sleeve (5) that also comprises one section axle centered by the axes O of vibrating body cone (1-1), the front end of the first inner sleeve (5) is airtight to be connected on the rear basin frame (1-2), the first inner sleeve (5) rear end aligns with the second inner sleeve (2) front end and is connected, and is smooth transition between the first inner sleeve (5) and the second inner sleeve (2).
3. the accurate ring pipe composite channel of according to claim 1 pair of basin frame group combination speaker system, it is characterized in that: in the unit, circular passage (4-1) between the outer wall of the second inner sleeve (2) the backward intermediate casing (15) adjacent with the second inner sleeve (2) several are installed and are connected block piece (13), perhaps in the unit, circular passage (4-1) between the inwall of outer tube (3) the backward intermediate casing (15) adjacent with outer tube (3) several are installed and are connected block piece (13), several perhaps all are installed in each unit, backward circular passage (4-1) connect block piece (13), connection block piece (13) is solid or is obturator; Adjacent two connect between the block pieces (13) for moving towards consistent transaudient passage with backward circular passage (4), and each transaudient passage has consistent cross-sectional area along its transaudient direction in the unit, same backward circular passage (4-1).
4. according to claim 1 and 2 or the accurate ring pipe composite channel of 3 described pairs of basin framves group combination speaker systems, it is characterized in that: the sidewall front end of described front basin frame (1-4) is with flanging, comprise that also the rear end is installed on the described flanging and the front outer tube (7) coaxial with vibrating body cone (1-1), is provided with the front inner sleeve (8) coaxial with front outer tube (7) in described front outer tube (7) inside; Described front inner sleeve (8) is connected to each other with front outer tube (7); Form forward direction ring pipe passage (6) between the inwall of the outer wall of front inner sleeve (8) and front outer tube (7).
5. the accurate ring pipe composite channel of according to claim 4 pair of basin frame group combination speaker system, it is characterized in that: also comprise at least one forward direction intermediate casing (14) that is positioned between described front outer tube (7) and the front inner sleeve (8), forward direction intermediate casing (14) is coaxial with vibration cone (1-2); Peak swing place close and vibrating body cone (1-1) forward direction correspondence position tries one's best in the rear end of forward direction intermediate casing (14); Forward direction intermediate casing (14) is connected to each other with front inner sleeve (8) and front outer tube (7); Form at least bipassage ring shape channel unit (6-1) between forward direction intermediate casing (14), front inner sleeve (8) and the front outer tube (7).
6. the according to claim 4 pair of accurate ring pipe composite channel of basin frame group combination speaker system is characterized in that: in forward direction ring pipe passage (6) several block pieces are installed; Block piece is solid or is obturator, is the trend transaudient passage consistent with forward direction ring pipe passage (6) between adjacent two block pieces, and each transaudient passage has consistent cross-sectional area along its transaudient direction.
7. the accurate ring pipe composite channel of according to claim 5 pair of basin frame group combination speaker system, it is characterized in that: in the unit, circular passage (6-1) between the outer wall of front inner sleeve (8) and the forward direction intermediate casing (14) adjacent with front inner sleeve (8) several block pieces are installed, perhaps in the unit, circular passage (6-1) between the inwall of front outer tube (7) and the forward direction intermediate casing (14) adjacent with front outer tube (7) several block pieces are installed, perhaps in each unit, circular passage (6-1) several block pieces are installed all; Block piece is solid or is obturator, be the trend transaudient passage consistent with forward direction ring pipe channel unit (6-1) between adjacent two block pieces, each transaudient passage has consistent cross-sectional area along its transaudient direction in the unit, same circular passage (6-1).
8. the according to claim 4 pair of accurate ring pipe composite channel of basin frame group combination speaker system is characterized in that: the retaining piece (9) that also comprises one section axle centered by the axes O of vibrating body cone (1-1); The front end of retaining piece (9) aligns with front inner sleeve (8) rear end and is connected, and the outer wall of retaining piece (9) is even surface; Be smooth transition between retaining piece (9) and the front inner sleeve (8); The rear end of described retaining piece (9) is positioned at the place ahead and as far as possible close this peak swing place at vibrating body cone (1-1) peak swing place.
9. the according to claim 6 pair of accurate ring pipe composite channel of basin frame group combination speaker system is characterized in that: the retaining piece (9) that also comprises one section axle centered by the axes O of vibrating body cone (1-1); The front end of retaining piece (9) aligns with front inner sleeve (8) rear end and is connected, and the outer wall of retaining piece (9) is even surface; Be smooth transition between retaining piece (9) and the front inner sleeve (8); The rear end of described retaining piece (9) is positioned at the place ahead and as far as possible close this peak swing place at vibrating body cone (1-1) peak swing place.
10. the according to claim 7 pair of accurate ring pipe composite channel of basin frame group combination speaker system is characterized in that: the retaining piece (9) that also comprises one section axle centered by the axes O of vibrating body cone (1-1); The front end of retaining piece (9) aligns with front inner sleeve (8) rear end and is connected, and the outer wall of retaining piece (9) is even surface; Be smooth transition between retaining piece (9) and the front inner sleeve (8); The rear end of described retaining piece (9) is positioned at the place ahead and as far as possible close this peak swing place at vibrating body cone (1-1) peak swing place.
CN201310029238.2A 2013-01-27 2013-01-27 Double-basin-frame combined type loudspeaker system with precise ring-shaped pipe composite channel group Active CN103079155B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108989933A (en) * 2018-07-16 2018-12-11 广州艺腾电子产品有限公司 Headphone structure
CN110460937A (en) * 2019-08-23 2019-11-15 朱虹斐 Focus type loudspeaker
CN111787472A (en) * 2020-08-28 2020-10-16 歌尔光学科技有限公司 Sound production structure, audio equipment and wear display device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620010A1 (en) * 1995-05-18 1996-11-21 Bose Corp Loudspeaker system with satellite housing
CN2532651Y (en) * 2002-02-08 2003-01-22 石丰山 Loudspeaker
CN1437427A (en) * 2002-02-08 2003-08-20 石丰山 New-type loudspeaker system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620010A1 (en) * 1995-05-18 1996-11-21 Bose Corp Loudspeaker system with satellite housing
CN2532651Y (en) * 2002-02-08 2003-01-22 石丰山 Loudspeaker
CN1437427A (en) * 2002-02-08 2003-08-20 石丰山 New-type loudspeaker system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108989933A (en) * 2018-07-16 2018-12-11 广州艺腾电子产品有限公司 Headphone structure
CN110460937A (en) * 2019-08-23 2019-11-15 朱虹斐 Focus type loudspeaker
CN111787472A (en) * 2020-08-28 2020-10-16 歌尔光学科技有限公司 Sound production structure, audio equipment and wear display device
CN111787472B (en) * 2020-08-28 2022-03-22 歌尔光学科技有限公司 Sound production structure, audio equipment and wear display device

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