EP3596938A1 - Dispositif monobloc d'enceinte acoustique amplifiée. - Google Patents
Dispositif monobloc d'enceinte acoustique amplifiée.Info
- Publication number
- EP3596938A1 EP3596938A1 EP18714556.0A EP18714556A EP3596938A1 EP 3596938 A1 EP3596938 A1 EP 3596938A1 EP 18714556 A EP18714556 A EP 18714556A EP 3596938 A1 EP3596938 A1 EP 3596938A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- speakers
- enclosure according
- loudspeakers
- speaker
- enclosure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003321 amplification Effects 0.000 claims abstract description 16
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 16
- 230000002238 attenuated effect Effects 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 5
- 239000012528 membrane Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only using transducers reproducing the same frequency band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
- H04R9/063—Loudspeakers using a plurality of acoustic drivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
- H04R2201/028—Structural combinations of loudspeakers with built-in power amplifiers, e.g. in the same acoustic enclosure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
- H04R3/14—Cross-over networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
Definitions
- the present invention relates to a monobloc amplified loudspeaker device.
- Integral control systems make it possible to control the elongation of the membranes of the subwoofer or, as described in US Pat. No. 6,353,670 (GASNER DONALD R), the harmful resonances measured punctually at certain frequencies inside. loudspeakers themselves. While increasing or reducing punctually the magnitude of the displacement of their membranes and thus the noise level of the speakers in the low register, we manage to control these same displacements by limiting them to high power when their voice coil moves away too much of its magnetic field or when the sound level at certain frequencies leads to undesirable internal resonance effects, so that any distortion or sound coloring can be permanently contained, whatever the level of listening.
- These systems which require electronic circuits and specific sensors often complex, as shown in the aforementioned US Pat. No. 6,353,670, as well as, if possible an amplification all the more powerful as the size of the loudspeakers decreases, are reserved for high-end achievements.
- the two speakers control their possible excessive elongations and thereby allow, at equivalent sound power level, to significantly reduce the distortion found in the low frequencies compared to that of a conventional acoustic loudspeaker of equivalent size. Moreover, a better sound level is obtained in the low register than with a conventional closed charge while maintaining, as for a vented speaker, a bandwidth of good level in the low end of the sound spectrum while remaining compatible with a suitability. power without distortion.
- the speakers of such a device are intended to be connected to a separate, versatile amplifier.
- the rear speaker connected to the audio output of the external amplifier is connected with the front speaker in a parallel electrical scheme.
- the front speaker when relayed in frequencies to the top of the sound spectrum only by tweeters, is responsible for reproducing in this classic pattern of configuration the bass register and the midrange / treble register.
- the said rear loudspeaker whose cone is directed towards the rear of the front loudspeaker membrane and which is thus not filtered separately, rises logically in frequencies like the front loudspeaker, producing in the direction of the loudspeaker. rear of the membrane thereof, especially above 120 Hz, interference in the form of standing waves harmful to the sound reproduction and sound clarity in the midrange of the entire system.
- the two speakers work rigorously in piston as well as in phase.
- the pneumatic coupling of the two loudspeakers makes it possible to significantly reduce the overall distortion of the loudspeaker in the low frequencies, by reducing in this frequency range the movement of the two high-power membranes.
- the front speaker which no longer functions as a piston, is displaced by compared to the rear loudspeaker, thereby causing the medium low frequency band a level drop.
- the front speaker which has at the rear of its membrane a small volume of air, intrinsically resonates at a frequency substantially higher than that of the rear speaker, which prevents it, all by unnecessarily consuming power, being electrically active in the extreme low, unlike the rear speaker.
- the double partition results in a mandatory complication of the traditional cabinetmaking scheme, a larger volume and less tight as well as a complication of the assembly workforce dedicated to the second internal speaker.
- the device object of the present invention while adopting the same pattern of implantation of loudspeakers in tandem, aims to overcome all the various disadvantages described above, as well as to seize the opportunity offered by the recent technical possibilities for powerful, compact and powerful amplifications.
- the device according to the invention is an amplified acoustic enclosure of the type comprising:
- vent not communicating pneumatically with this sealed compartment and connecting the inner part of the enclosure to the outside thereof
- each of these two loudspeakers (1) and (2) is fed by separate amplification channels (3) and (3 ') and each having their specific frequency band so as to that the frequency response curve of the rear loudspeaker (2) is gradually attenuated by at least 3db from and above a frequency range between 60 Hz and 120 Hz.
- Figure 1 is a cross-sectional view of the device according to a first embodiment of the invention
- FIGS. 1, 2 and 3 are plan views of the device according to another embodiment of the invention.
- This device according to the invention consists of a front loudspeaker (1) and a rear loudspeaker (2), mechanically coupled together by the intermediate a small volume of air itself delimited preferably by a connecting piece forming a watertight partition (4) and connecting these two speakers.
- This connecting piece can be of complex shape, adapted to the geometry of said speakers and manufactured using possibly injection techniques, thermoforming or 3D printing.
- a vent (5) provides the pneumatic connection between the outside air and the inner part of the chamber located outside of this sealed volume; a second vent (5 ') can also be provided as shown in Figure 3.
- the rear loudspeaker (2) intrinsically has a lower resonant frequency than that of the front speaker (1), the latter being charged at the rear of its membrane by a minimum volume of air; but it may, according to one embodiment, also be designed for this purpose.
- the device according to the invention further comprises an internal amplifier, preferably of class D, integrated in the enclosure. It consists of at least two channels (3) and (3 ') separately connected to each speaker (1) and (2).
- Each of these two amplified central channels is calibrated to allow precise and differentiated modulation of their frequency ranges concerning the characteristics of each loudspeaker (1) and (2) and, if appropriate, their respective sound levels.
- This filtering makes it possible, for example, and in this embodiment, to gradually reduce the level of the rear loudspeaker (2) above and from 70 Hz, as illustrated in the diagram below, in order to avoid , as explained above, any negative interference of the rear loudspeaker (2) on the front loudspeaker (1).
- each amplification channel (3), (3 ') can be differentially attenuated by at least -6db below or around each resonance frequency of the two loudspeakers (1 ) and (2).
- thresholds and higher or lower frequencies can of course be predefined on a case by case basis depending on the yields and the diameter of the various speakers used as well as amplification powers available.
- the device according to the invention makes it possible to optimize the rate of feedback of the amplifier.
- An external amplifier must be versatile and its feedback rate is high (usually about 1 volt for a gain of 2000).
- the device according to the invention makes it possible to circumvent this problem and to reduce the feedback rate of the dedicated amplifier for gain values substantially lower than 1000 for 1 volt at the channels (3), (3 ') while keeping the distortion of the speakers low and a more natural sound.
- Two or four additional amplified channels possible will also enable the loudspeakers specialized in the high frequencies (6) and (6 ') to be separately supplied with respect to the treble and possibly the midrange, as provided for in an alternative embodiment of the invention.
- the tweeters (6) and (6 ') and possibly mediums will be powered separately by differentiated amplifier channels.
- FIG. 1 concerns a device in which the two loudspeakers (1) and (2) are schematically represented inside an amplified monobloc enclosure of conventional architecture and equipped with a single vent (5) towards the back of the enclosure; in Figure 2, this vent (5) is facing towards the front of said enclosure.
- FIG. 3 concerns a device in which are schematically represented the two loudspeakers (1) and (2) inside an amplified monoblock enclosure, equipped with a system for broadcasting the highs by the loudspeakers. speakers (6) and (6 '), as well as two vents (5) and (5') facing towards the front of said enclosure.
- the power level of the channel which powers the rear loudspeaker (2), within a frequency range situated between the resonance frequency of this loudspeaker (2) and possibly up to 200 Hz is noted punctually by at least + 3db with respect to the average amplification power level of the loudspeakers.
- These separate amplification channels (3) and (3 ') each have their specific frequency band so that the frequency response curve of the rear loudspeaker (2) is gradually attenuated by at least 3db from and above a frequency range between 60 Hz and 120 Hz.
- Each amplification channel (3), (3 ') is gradually attenuated and from each resonance frequency of the loudspeakers (1), (2).
- the curve below is the frequency response curve, after corrections, of the rear loudspeaker (2), of the front loudspeaker (1) as well as the representation (in dotted line) at the junction of these of their resulting curve.
- the assembly can also integrate loudspeakers (6) and (6 ') responsible for reproducing the high frequencies and possibly medium frequencies, which can thus be placed either according to conventional speaker diagrams ( Figure 1 and Figure 2) or possibly in more complex patterns ( Figure 3).
- the speakers (6) and (6 ') responsible for restoring the high frequencies have been advantageously inclined upwards and positioned in an opposite direction of the loudspeakers (1) and (2) in order to benefit from more advantageously to the whole of a spatial effect.
- FIG. 1 and 2 A more traditional configuration is shown in Figures 1 and 2 for these tweeters and / or midrange speakers that are not inclined. All of these different loudspeakers dedicated to high frequencies can be controlled in frequencies by conventional means (passive filters) or preferably by specific active systems (amplifiers).
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Circuit For Audible Band Transducer (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1700273A FR3064146B1 (fr) | 2017-03-16 | 2017-03-16 | Dispositif monobloc et stereophonique d'enceinte acoustique amplifiee |
PCT/FR2018/000054 WO2018167386A1 (fr) | 2017-03-16 | 2018-03-15 | Dispositif monobloc d'enceinte acoustique amplifiée. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3596938A1 true EP3596938A1 (fr) | 2020-01-22 |
EP3596938B1 EP3596938B1 (fr) | 2022-05-11 |
Family
ID=59409369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18714556.0A Active EP3596938B1 (fr) | 2017-03-16 | 2018-03-15 | Dispositif monobloc d'enceinte acoustique amplifiée. |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3596938B1 (fr) |
FR (1) | FR3064146B1 (fr) |
WO (1) | WO2018167386A1 (fr) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2343388A1 (fr) * | 1976-03-05 | 1977-09-30 | Siare | Enceinte acoustique perfectionnee |
FR2625844A1 (en) * | 1988-01-13 | 1989-07-13 | Audio Design | "Push-pull" loudspeaker acoustic system for chambers |
US5374124A (en) * | 1993-04-06 | 1994-12-20 | Cass Audio, Inc. | Multi-compound isobarik loudspeaker system |
US6353670B1 (en) * | 1996-07-02 | 2002-03-05 | Donald R. Gasner | Actively control sound transducer |
NZ535385A (en) * | 2002-03-05 | 2006-02-24 | Audio Products Int Corp | Loudspeaker with shaped sound field |
US20060147075A1 (en) * | 2004-12-31 | 2006-07-06 | Gingko Audio | Loudspeaker comprising coaxially-disposed drivers |
US20080285762A1 (en) * | 2007-05-15 | 2008-11-20 | Keiichi Iwamoto | Point source speaker systems |
TWI635753B (zh) * | 2013-01-07 | 2018-09-11 | 美商杜比實驗室特許公司 | 使用向上發聲驅動器之用於反射聲音呈現的虛擬高度濾波器 |
-
2017
- 2017-03-16 FR FR1700273A patent/FR3064146B1/fr active Active
-
2018
- 2018-03-15 WO PCT/FR2018/000054 patent/WO2018167386A1/fr unknown
- 2018-03-15 EP EP18714556.0A patent/EP3596938B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
FR3064146B1 (fr) | 2020-02-21 |
FR3064146A1 (fr) | 2018-09-21 |
EP3596938B1 (fr) | 2022-05-11 |
WO2018167386A1 (fr) | 2018-09-20 |
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