CN204348329U - A kind of sound-absorbing composite board - Google Patents
A kind of sound-absorbing composite board Download PDFInfo
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- CN204348329U CN204348329U CN201420852335.1U CN201420852335U CN204348329U CN 204348329 U CN204348329 U CN 204348329U CN 201420852335 U CN201420852335 U CN 201420852335U CN 204348329 U CN204348329 U CN 204348329U
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Abstract
The utility model relates to sound absorption technique field, particularly relates to a kind of sound-absorbing composite board.This sound-absorbing composite board comprises microperforated panel and the matrix of laminating setting; Wherein, described microperforated panel is provided with multiple through sound-absorbing hole; Described matrix is provided with multiple sound absorption cavity, is provided with communicating passage between adjacent two described sound absorption cavitys; The surface offering described sound absorption cavity of described matrix and described microperforated panel are fitted and are arranged, and the sound-absorbing hole on described microperforated panel and the sound absorption cavity connects on described matrix.Compared with prior art, communicating passage between microperforated panel of the present utility model, sound absorption cavity and cavity all effectively can participate in power consumption sound absorption, utilize microperforated panel to play the effect of power consumption with the resonance sound-absorbing principle of sound absorption cavity, the acoustically effective of this structure can be made particularly remarkable.Meanwhile, above-mentioned sound absorption structure lays respectively on matrix and microperforated panel, and detachable is independently processed, and manufacturability is better, has the advantages that production cost is controlled.
Description
Technical field
The utility model relates to sound absorption technique field, particularly relates to a kind of sound-absorbing composite board.
Background technology
In noise control engineering, microperforated panel resonant structure is a kind of sound absorption technique of extensive employing.As everyone knows, the sound absorbing mechanism of microperforated panel resonance sound-absorbing structure is, the system class of the air layer composition corresponding thereto of each perforation on microperforated panel is similar to Helmholtz resonator, and microperforated panel resonance sound-absorbing structure can be regarded as the parallel connection of many Helmholtz resonators.Just excite air vibration in cavity when sound wave enters after aperture, if when frequency of sound wave is identical with this structure resonant frequency, chamber air just resonates, perforated plate pore-throat place air column is of reciprocating vibration, and speed, amplitude reach maximal value, and friction is also maximum with damping; Now, make acoustic energy change heat energy into maximum, namely sound energy consumption is maximum, thus plays efficient sound absorption.
Based on above-mentioned performance advantage, microperforated panel resonant structure is widely applied in various fields, as aircraft noise reduction, gymnasium sound absorption, ventilating duct sound absorption etc.But by the constraint of practical application means, the sound absorption characteristics of microperforated panel can not expanded to greatest extent, and processing technology is not good.
In view of this, urgently looking for another way is optimized design for existing microperforated panel resonant structure, effectively to overcome above-mentioned defect, thus provides reliable guarantee for effectively improving sound absorbing capabilities.
Utility model content
(1) technical matters that will solve
The technical problems to be solved in the utility model solves to provide a kind of handling ease, acoustically effective significant sound-absorbing composite board.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of sound-absorbing composite board, comprises microperforated panel and the matrix of laminating setting; Wherein, described microperforated panel is provided with multiple through sound-absorbing hole; Described matrix is provided with multiple sound absorption cavity, is provided with communicating passage between adjacent two described sound absorption cavitys; The surface offering described sound absorption cavity of described matrix and described microperforated panel are fitted and are arranged, and the sound-absorbing hole on described microperforated panel and the sound absorption cavity connects on described matrix.
Preferably, described matrix is elastic matrix.
Preferably, described matrix adopts rubber, resin or makrolon material to make.
Preferably, the diapire of described sound absorption cavity is absorptive thin layer.
Preferably, the thickness of described sound-absorbing composite board is 1mm ~ 30mm, and the minimum thickness of described absorptive thin layer is 0.1mm ~ 1mm.
Preferably, in the projecting plane parallel with plate face, the relative position of described microperforated panel and described matrix is adjustable, so that described sound absorption cavity is relative to described sound-absorbing hole displacement.
Preferably, the shape of described sound absorption cavity, from open side to diapire in the Long-term change trend that reduces successively.
Preferably, the sound-absorbing hole on described microperforated panel is communicated with the sound absorption cavity one_to_one corresponding on described matrix.
Preferably, described sound absorption cavity is cylindrical, elliptical cylinder-shape or taper.
Preferably, between adjacent two described sound absorption cavitys, communicating passage comprises at least one microchannel.
(3) beneficial effect
Technique scheme tool of the present utility model has the following advantages:
First, the sound-absorbing composite board that the utility model provides is compounded to form by matrix and microperforated panel, wherein, has the microperforated panel of multiple through sound-absorbing hole, fits tightly with the matrix with the cavity that absorbs sound, and matrix is provided with communicating passage between adjacent sound absorption cavity.In the course of work, not only can be consumed energy by microperforated panel, the communicating passage absorbed sound between cavity and cavity also all can effectively absorb sound, set up composite sound absorbing measure thus, microperforated panel is utilized to play the effect of power consumption with the resonance sound-absorbing principle of sound absorption cavity, the acoustically effective of this structure can be made particularly remarkable, be better than traditional sound absorption mechanism.Meanwhile, above-mentioned sound absorption structure lays respectively on matrix and microperforated panel, and detachable is independently processed, and manufacturability is better, has the advantages that production cost is controlled.
Secondly, in preferred version of the present utility model, matrix adopts the elastic matrix that can absorb sound, and the diapire of sound absorption cavity is absorptive thin layer, thus consumed energy by vibration of thin membrane, form with sound-absorbing hole, absorb sound cavity and communicating passage community of consuming energy, promote the effect of its sound absorbing capabilities further.
In another preferred version of the present utility model, the relative position of microperforated panel and matrix is adjustable along both binding faces, so that the cavity that absorbs sound produces displacement relative to sound-absorbing hole.Setting like this, the overall acoustic board microstructure that microperforated panel and matrix are formed changes, and then changes the sound absorption frequency of this sound-absorbing composite board, has good adaptability.
Accompanying drawing explanation
Fig. 1 is the vertical view of sound-absorbing composite board described in the utility model embodiment one;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the sectional view of sound-absorbing composite board described in the utility model embodiment two.
In figure:
Microperforated panel 1, sound-absorbing hole 11, matrix 2, sound absorption cavity 21, sound absorption cavity 21a, communicating passage 22, absorptive thin layer 23.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
Embodiment one
Refer to Fig. 1 and Fig. 2, wherein, Fig. 1 is the vertical view of sound-absorbing composite board described in the present embodiment, and Fig. 2 is the A-A sectional view of Fig. 1.
The microperforated panel 1 that this sound-absorbing composite board is arranged by fitting and matrix 2 are composited.As shown in Figure 1, microperforated panel 1 is provided with multiple through sound-absorbing hole 11; Here, the sound-absorbing hole 21 on microperforated panel 1 is circular, and in fact, microperforated panel 1 can also be designed to rectangle, sexangle, ellipse or irregularly shaped as required.As shown in Figure 2, matrix 2 is provided with multiple sound absorption cavity 21, and is provided with communicating passage 22 between adjacent two sound absorption cavitys 21.
In the course of work, sound wave, via the communicating passage 22 between sound-absorbing hole 11, sound absorption cavity 21 and adjacent sound absorption cavity 21, realizes sound absorption power consumption.The sound absorbing mechanism of this sound-absorbing composite board is as follows:
When sound wave arrives microperforated panel 1 surperficial, the sound absorption of microperforated panel is first utilized to consume energy; Sound, by sound-absorbing hole 11, enters in the sound absorption cavity 21 in matrix 2, and the system class that sound-absorbing hole 11 sound absorption cavity 21 corresponding thereto forms is similar to Helmholz resonance device.Have a communicating passage 22 (being that three microchannels are formed shown in figure) between adjacent sound absorption cavity 21 at least, be connected to form the parallel connection of Helmholz resonance device, play the effect of sound energy consumption.
It should be noted that, in figure, sound-absorbing hole 11 arrangement in 3*12 line-column matrix, only for carrying out exemplary illustration, and can not be interpreted as the restriction to technical scheme.Simultaneously; sound-absorbing hole 11 on microperforated panel 1 can be communicated with sound absorption cavity 21 one_to_one corresponding on matrix 2; be appreciated that; sound-absorbing hole 11 also can adopt one-to-many or many-to-one mode to set up to be communicated with sound absorption cavity 21, as long as function needs meeting aforementioned sound absorption community are all in the scope that the application's request is protected.
In order to promote the acoustically effective of sound-absorbing composite board further, matrix 2 can be elastic matrix, preferably adopts rubber, resin or makrolon material to make; Utilize the damping characteristic that it is good, its sound absorbing capabilities can be improved further.On this basis, can do further optimization for matrix 2, the diapire of sound absorption cavity 21 is absorptive thin layer 23, and this absorptive thin layer 23 can vibrate under the effect of sound wave, also can play effect of vibration power consumption.Specifically, the sound-absorbing composite board of this programme, its integral thickness may be selected to be 1mm ~ 30mm, and adaptably, the minimum thickness of absorptive thin layer is 0.1mm ~ 1mm; Should be appreciated that " minimum thickness " here refers to, for the thickness at the absorptive thin layer 23 minimum dimension place of the sound absorption cavity 21 of non-constant section, and for prismatic sound absorption cavity 21, such as cylindric, then refer to the basic size of diapire absorptive thin layer 23.
In addition, along both binding faces, microperforated panel 1 is adjustable with the relative position of matrix 2, so that the cavity 21 that absorbs sound is relative to sound-absorbing hole 11 displacement.That is, matrix 2 in this structure is removable, by mobile matrix 2, the sound absorption cavity 21 being arranged in matrix 2 is driven to be moved, thus the overall sound absorption structure making sound-absorbing hole 11, sound absorption cavity 21 and communicating passage 22 form changes, and then the cavity depth changed corresponding to sound-absorbing hole 11 and position, the final sound sucting band changing sound absorption cavity sound-absorbing composite board, reaches the adjustment of sound absorbing capabilities.
Shown in figure, the shape of sound absorption cavity 21 is the parabola shaped of non-constant section shape, namely from open side (nearly microperforated panel 1 side) to diapire in the Long-term change trend that reduces successively, thus, three microchannels of sound absorption cavity 21 communicating passage 22, between the upper and lower every arranging length difference, and then the acoustical absorption coefficient under different frequency can be obtained, having good sound absorption at different frequency.Here, sound absorption cavity 21 also can also be elliptical cylinder-shape, and the sound absorption cavity of other abnormity.
Special instruction is the sound absorption cavity 21 of the Long-term change trend reduced successively to diapire from open side, can also the taper described in following embodiment.
Embodiment two
Refer to Fig. 3, the figure shows the sectional view of sound-absorbing composite board described in the second embodiment, its slice location is identical with the slice location of Fig. 2.In addition it should be noted that, in figure, identical function component adopts same tag to show, with clear difference and contact that two embodiments are shown.
The difference of this programme and the first embodiment is: the absorb sound cross section profile of cavity of the first embodiment is the parabolic shape of opening upwards; And in this programme, the cross section profile of sound absorption cavity 21a is the taper of opening upwards.Wherein form and annexation identical with the first embodiment, therefore the present embodiment repeats no more.
In sum, the utility model has the following advantages:
(1) sound-absorbing composite board of the present utility model comprises: the elastic matrix 2 with sound absorption cavity 21 and the microperforated panel 1 be fitted on elastic matrix.Handling ease, production cost is low, and acoustically effective is remarkable.
(2) elastic matrix in the utility model makes the weight of whole sound absorption cavity Active Absorption mechanism decline to some extent, and this kind of matrix is also conducive to absorbing sound the making of cavity simultaneously.
(3) on matrix, be provided with the abnormity sound absorption cavity of cylindrical, elliptical cylinder-shape or taper, cavity can play resonant interaction with microperforated panel, improves acoustically effective further.
(4) microchannel is had at least to connect between adjacent sound absorption cavity, form communicating passage 22, for the cavity of designed cylindrical, elliptical cylinder-shape or taper, on thickness of slab direction, the micro-pipe length of diverse location is different, has good sound absorption at different frequency;
(5) absorptive thin layer of sound absorption cavity diapire of the present utility model, can play effect of vibration of thin membrane power consumption further.
(6) elastic matrix in sound-absorbing composite board of the present utility model can move, the sound absorption cavity being arranged in matrix is moved, reach the effect regulating acoustical absorption coefficient and sound sucting band, meet the sound absorption requirement of different occasion, there is good application prospect.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (10)
1. a sound-absorbing composite board, is characterized in that, comprising:
Microperforated panel, which is provided with multiple through sound-absorbing hole; With
Matrix, which is provided with multiple sound absorption cavity, is provided with communicating passage between adjacent two described sound absorption cavitys; And
The surface offering described sound absorption cavity of described matrix and described microperforated panel are fitted and are arranged, and the sound-absorbing hole on described microperforated panel and the sound absorption cavity connects on described matrix.
2. sound-absorbing composite board according to claim 1, is characterized in that, described matrix is elastic matrix.
3. sound-absorbing composite board according to claim 2, is characterized in that, described matrix adopts rubber, resin or makrolon material to make.
4. sound-absorbing composite board according to any one of claim 1 to 3, is characterized in that, the diapire of described sound absorption cavity is absorptive thin layer.
5. sound-absorbing composite board according to claim 4, is characterized in that, the thickness of described sound-absorbing composite board is 1mm ~ 30mm, and the minimum thickness of described absorptive thin layer is 0.1mm ~ 1mm.
6. sound-absorbing composite board according to claim 4, is characterized in that, along both binding faces, the relative position of described microperforated panel and described matrix is adjustable, so that described sound absorption cavity is relative to described sound-absorbing hole displacement.
7. sound-absorbing composite board according to claim 4, is characterized in that, the shape of described sound absorption cavity, from open side to diapire in the Long-term change trend that reduces successively.
8. sound-absorbing composite board according to claim 7, is characterized in that, the sound-absorbing hole on described microperforated panel is communicated with the sound absorption cavity one_to_one corresponding on described matrix.
9. sound-absorbing composite board according to claim 4, is characterized in that, described sound absorption cavity is cylindrical, elliptical cylinder-shape or taper.
10. sound-absorbing composite board according to claim 1, is characterized in that, between adjacent two described sound absorption cavitys, communicating passage comprises at least one microchannel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420852335.1U CN204348329U (en) | 2014-12-26 | 2014-12-26 | A kind of sound-absorbing composite board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420852335.1U CN204348329U (en) | 2014-12-26 | 2014-12-26 | A kind of sound-absorbing composite board |
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| CN204348329U true CN204348329U (en) | 2015-05-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104616648A (en) * | 2014-12-26 | 2015-05-13 | 北京市劳动保护科学研究所 | Composite sound absorption plate |
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2014
- 2014-12-26 CN CN201420852335.1U patent/CN204348329U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104616648A (en) * | 2014-12-26 | 2015-05-13 | 北京市劳动保护科学研究所 | Composite sound absorption plate |
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