CN203057452U - 1/8 double distance transmission line sound box - Google Patents
1/8 double distance transmission line sound box Download PDFInfo
- Publication number
- CN203057452U CN203057452U CN 201320031988 CN201320031988U CN203057452U CN 203057452 U CN203057452 U CN 203057452U CN 201320031988 CN201320031988 CN 201320031988 CN 201320031988 U CN201320031988 U CN 201320031988U CN 203057452 U CN203057452 U CN 203057452U
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- transmission line
- audio amplifier
- woofer
- horn
- resonant cavity
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- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
The utility model discloses a 1/8 double distance transmission line sound box. The 1/8 double distance transmission line sound box comprises a box body, a bass loudspeaker resonant chamber arranged in the box body and a 1/8 wavelength transmission line short tube, wherein a baffle plate is arranged between the bass loudspeaker resonant chamber and the 1/8 wavelength transmission line short tube, the baffle plate is provided with a filtering hole, and the 1/8 wavelength transmission line short tube comprises a plane wave resonant chamber, a first folding horn and a second folding horn which are communicated in order. The 1/8 double distance transmission line sound box has advantages of small volume, relatively high bass reduction capability, low cost and high work efficiency.
Description
Technical field
The utility model belongs to a kind of audio amplifier, especially relates to a kind of 1/8 times of journey transmission line audio amplifier.
Background technology
The similar folding acoustics pipeline as the labyrinth of conventional transmission line for its cross section of energy of not hindering the radiation of loud speaker back must be enough greatly, and also needs long enough to reduce the low frequency volume.In the sound transmission process, because the compressibility of air, the diffraction characteristic that frequency possesses at the sound wave below 250 hertz, make that audio amplifier work perfect condition in practice far can't be near theoretical level, even if present most of transmission line audio amplifier all adopts the design of 1/4 wavelength, still need loaded down with trivial details sound-absorbing debugging just can promote the operating efficiency of audio amplifier.It is main purpose to eliminate the medium-high frequency sound wave that conventional transmission line audio amplifier adopts long duct, intercepting accurate resonance frequency attaches most importance to, it is neat and tidy to reach tone color, the requirement that bass is pure, guarantee to greatest extent a certain bass frequencies to be strengthened under the situation of the noiseless output of loud speaker front sound wave, but the casing volume is bigger, operating efficiency is on the low side unavoidably as far as possible, because consumption is excessive in the acoustic wave energy transmission course that the motion of its loud speaker produces, major part adds for the air that promotes long duct.
At present, a lot of audio amplifiers adopt phase inverting box, phase-reversing tube is by the output of amplification low frequency main frequency and the restriction medium-high frequency sound wave of control output, weak and the characteristics that can't obviously differentiate of the auditory function resolution capability of utilizing people's ear, the sound wave that utilizes the loud speaker back side is used through paraphase, is superimposed upon on the sound wave in loud speaker front to reach the purpose of increasing work efficiency.But phase inverting box needs the high-performance loud speaker could improve the sound resolution, because its output is a large amount of muddy resonant acoustic wave, thereby reaches the output of wideband bass, can not well reduce wideband bass acoustic wave energy and the tone color of loud speaker itself.
The utility model content
The purpose of this utility model is to provide a kind of casing volume little, and the bass reducing power is higher, 1/8 times of journey transmission line audio amplifier of cost reduction and high efficiency.
According to an aspect of the present utility model, a kind of 1/8 times of journey transmission line audio amplifier is provided, comprise casing, be located at the interior woofer resonant cavity of casing and the transmission line short tube of 1/8 wavelength, be provided with dividing plate between the transmission line short tube of woofer resonant cavity and 1/8 wavelength, dividing plate is provided with the filtering hole, and the transmission line short tube of 1/8 wavelength comprises plane wave resonant cavity, first folded horn and second folded horn that is communicated with successively.Be provided with the transmission conduit of 1/8 wavelength, make sound wave that loudspeaker movements produces at less relatively spatial volume compressed air, relative energy is higher, thereby has improved the efficient of audio amplifier, efficient has improved 10% ~ 25% than 1/4 times of journey transmission line audio amplifier, also makes the casing volume reduce simultaneously.
In some embodiments, casing is provided with the woofer installing hole, and the woofer installing hole is located at a side of woofer resonant cavity and corresponding with the filtering hole.Thereby the sound that makes woofer send later acts directly on the woofer resonant cavity.
In some embodiments, the woofer resonant cavity is the square cavity.Use positive tetragonal body cavity and construct the balance exercise of cone in the time of can ensureing high sound pressure all the time, the symmetrical structure of cavity is with the consumption that liquidates of limited bass standing wave energy, taken full advantage of the concussion energy of loud speaker simultaneously, improved operating efficiency and obtained higher bass reducing power.
In some embodiments, the aperture in filtering hole is 1/3 of woofer installing hole aperture, is used for the output of restriction alt acoustic reflection, and the acoustic wave energy more than 250 hertz that can't diffraction with major part stops.
In some embodiments, be provided with surface plate between plane wave resonant cavity and first folded horn, the surface plate width is consistent with spacer width.The plane wave resonant cavity transmits bass Forced Mixing and the break-in formation plane wave of the output of filtering hole, simultaneously, the reflecting part bass returns the woofer resonant cavity, thereby the filtering hole is formed certain negative pressure, slow down the bass energy rate of release of woofer resonant cavity, in the woofer resonant cavity, form an air cushion, be conducive to accelerate returning to form of the diaphragm of loudspeaker.
In some embodiments, be provided with baffle plate between first folded horn and second folded horn, baffle plate is obliquely installed, and the distance of baffle plate and surface plate becomes big gradually by bottom to the top orientation of first folded horn.The harmonic wave total amount that first folded horn and second folded horn constantly reflect premixed bass energy plane wave transmission and expansion in the plane wave resonant cavity, the inclined degree of baffle plate can change the composition of output bass energy waves and final bass releasing degree.
In some embodiments, the second folded horn top is communicated with the top of first folded horn, and the bottom of second folded horn is provided with the horn sound mouth.
In some embodiments, 1/8 times of journey transmission line audio amplifier also comprises and is located at the high middle pitch horn region of isolating fully in the casing.High middle pitch horn region isolates fully, and the high middle pitch that makes audio amplifier send is not subjected to the influence of bass.
Description of drawings
Fig. 1 is the structural representation of 1/8 times of journey transmission line audio amplifier of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
With reference to Fig. 1: 1/8 times of journey transmission line audio amplifier, comprise casing 1, be located at the woofer resonant cavity 2 in the casing 1, the transmission line short tube 3 of 1/8 wavelength and the high middle pitch horn region 4 of isolating fully, the length of the transmission line short tube 3 of 1/8 wavelength is 1/8 of harmonic frequency of loudspeakers wavelength, and woofer resonant cavity 2 is the square cavity.Be provided with dividing plate 7 between the transmission line short tube 3 of woofer resonant cavity 2 and 1/8 wavelength, dividing plate 7 is provided with filtering hole 5.The transmission line short tube 3 of 1/8 wavelength comprises plane wave resonant cavity 31, first folded horn 32 and second folded horn 33 that is communicated with successively.
Casing 1 is provided with woofer installing hole 11, and woofer installing hole 11 is located at a side of woofer resonant cavity 2 and corresponding with filtering hole 5, and the aperture in filtering hole 5 is 1/3 of woofer installing hole 11 apertures.Be provided with surface plate 6 between plane wave resonant cavity 31 and first folded horn 32, surface plate 6 width are consistent with dividing plate 7 width.
Be provided with baffle plate 34 between 33 of first folded horn 32 and second folding numbers, baffle plate 34 is obliquely installed, and the distance of baffle plate 34 and surface plate 6 becomes big gradually by bottom to the top orientation of first folded horn 32.Second folded horn, 33 tops are communicated with the top of first folded horn 32, and the bottom of second folded horn 33 is provided with horn sound mouth 12.
During the work of 1/8 times of journey transmission line audio amplifier, be installed in the wavelength of sound energy sent at the loud speaker back side on the woofer installing hole 11 in woofer resonant cavity 2.Woofer resonant cavity 2 with major part can't diffraction the acoustic wave energy more than 250 hertz stop, remaining acts on plane wave resonant cavity 31 by filtering hole 5, through the bass break-in formation plane wave transmission of plane wave resonant cavity 31 with 5 outputs of filtering hole, plane wave changes the elasticity, deepness of the composition of output bass energy waves and tone color and hale and hearty etc. through first folded horn 32 and second folded horn 33 again, is exported by horn sound mouth 12 at last.Horn sound mouth 12 is connected with casing 1 outside air, with the bass coupling stack that loud speaker is directly exported, finally improves the integral energy fan-out capability of audio amplifier.
Above-described only is preferred implementation of the present utility model; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model creation design; can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (8)
1.1/8 journey transmission line audio amplifier doubly, it is characterized in that, comprise casing, be located at the interior woofer resonant cavity of casing and the transmission line short tube of 1/8 wavelength, be provided with dividing plate between the transmission line short tube of described woofer resonant cavity and 1/8 wavelength, described dividing plate is provided with the filtering hole, and the transmission line short tube of described 1/8 wavelength comprises plane wave resonant cavity, first folded horn and second folded horn that is communicated with successively.
2. 1/8 times of journey transmission line audio amplifier according to claim 1 is characterized in that described casing is provided with the woofer installing hole, and described woofer installing hole is located at a side of woofer resonant cavity and corresponding with described filtering hole.
3. 1/8 times of journey transmission line audio amplifier according to claim 2 is characterized in that described woofer resonant cavity is the square cavity.
4. 1/8 times of journey transmission line audio amplifier according to claim 2 is characterized in that, the aperture in described filtering hole is 1/3 of woofer installing hole aperture.
5. 1/8 times of journey transmission line audio amplifier according to claim 1 is characterized in that, be provided with surface plate between described plane wave resonant cavity and first folded horn, described surface plate width is consistent with spacer width.
6. 1/8 times of journey transmission line audio amplifier according to claim 5, it is characterized in that, be provided with baffle plate between described first folded horn and second folded horn, described baffle plate is obliquely installed, and the distance of described baffle plate and surface plate becomes big gradually by bottom to the top orientation of first folded horn.
7. 1/8 times of journey transmission line audio amplifier according to claim 6 is characterized in that, the described second folded horn top is communicated with the top of first folded horn, and the bottom of second folded horn is provided with the horn sound mouth.
8. according to each described 1/8 times of journey transmission line audio amplifier among the claim 1-7, it is characterized in that, also comprise and be located at the high middle pitch horn region of isolating fully in the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031988 CN203057452U (en) | 2013-01-21 | 2013-01-21 | 1/8 double distance transmission line sound box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031988 CN203057452U (en) | 2013-01-21 | 2013-01-21 | 1/8 double distance transmission line sound box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203057452U true CN203057452U (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320031988 Expired - Fee Related CN203057452U (en) | 2013-01-21 | 2013-01-21 | 1/8 double distance transmission line sound box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203057452U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104754487A (en) * | 2015-03-23 | 2015-07-01 | 歌尔声学股份有限公司 | Sound wave filter structure and lateral sound emitting loudspeaker module |
| CN110022509A (en) * | 2017-12-25 | 2019-07-16 | 雅马哈株式会社 | Loudspeaker structure |
| CN112544087A (en) * | 2018-04-13 | 2021-03-23 | 低音乡村喇叭有限公司 | Speaker system with multi-planar, nested, folded horn |
-
2013
- 2013-01-21 CN CN 201320031988 patent/CN203057452U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104754487A (en) * | 2015-03-23 | 2015-07-01 | 歌尔声学股份有限公司 | Sound wave filter structure and lateral sound emitting loudspeaker module |
| CN104754487B (en) * | 2015-03-23 | 2018-08-03 | 歌尔股份有限公司 | A kind of sound wave filter structure and a kind of side are spoken loud speaker module |
| CN110022509A (en) * | 2017-12-25 | 2019-07-16 | 雅马哈株式会社 | Loudspeaker structure |
| CN112544087A (en) * | 2018-04-13 | 2021-03-23 | 低音乡村喇叭有限公司 | Speaker system with multi-planar, nested, folded horn |
| US11683640B2 (en) | 2018-04-13 | 2023-06-20 | Low Country Horns, Llc | Speaker systems with polyplanar, nested, folded horns |
| CN112544087B (en) * | 2018-04-13 | 2023-09-01 | 低音乡村喇叭有限公司 | Speaker system with multi-planar, nested, folded horn |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20170121 |