CN204348328U - A kind of compound sound-absorption structural - Google Patents
A kind of compound sound-absorption structural Download PDFInfo
- Publication number
- CN204348328U CN204348328U CN201420850564.XU CN201420850564U CN204348328U CN 204348328 U CN204348328 U CN 204348328U CN 201420850564 U CN201420850564 U CN 201420850564U CN 204348328 U CN204348328 U CN 204348328U
- Authority
- CN
- China
- Prior art keywords
- sound
- absorption
- cavity
- board substrate
- structural
- 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.)
- Active
Links
Abstract
The utility model relates to sound absorption technique field, particularly relates to a kind of compound sound-absorption structural.The acoustic board of this compound sound-absorption structural comprises microperforated panel and board substrate, and microperforated panel is provided with multiple through sound-absorbing hole, and board substrate is provided with multiple sound absorption cavity, is provided with communicating passage between adjacent two sound absorption cavitys; The surface offering sound absorption cavity of board substrate and microperforated panel are fitted and are arranged, the sound-absorbing hole on microperforated panel and the sound absorption cavity connects on board substrate; And be provided with cavity between structural matrix and the board substrate of acoustic board.Compared with prior art, the microperforated panel of this programme, the communicating passage absorbed sound between cavity and cavity all effectively can participate in power consumption sound absorption, cavity between sound-absorbing composite board and structural matrix can play resonant interaction with acoustic board, makes the acoustically effective of this structure particularly remarkable.Meanwhile, above-mentioned sound absorption structure can independently be processed in split, 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 compound sound-absorption structural.
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 compound sound-absorption structural.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of compound sound-absorption structural, comprises be connected structural matrix and acoustic board; Described acoustic board comprises microperforated panel and board substrate, and wherein, described microperforated panel is provided with multiple through sound-absorbing hole, and described board substrate 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 board substrate 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 board substrate; Wherein, cavity is provided with between the board substrate of described structural matrix and described acoustic board.
Preferably, described board substrate is elastic matrix, and described structural matrix is rigid matrix.
Preferably, described board substrate adopts rubber, resin or polycarbonate to make, and described structural matrix adopts metal, timber, glass, organic glass, pottery, gypsum or cement production systD.
Preferably, the diapire of described sound absorption cavity is absorptive thin layer.
Preferably, the thickness of described acoustic board is 1mm ~ 30mm, and the minimum thickness of described absorptive thin layer is 0.1mm ~ 1mm.
Preferably, along both binding faces, the relative position of described microperforated panel and described board substrate 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 board substrate, and between adjacent two described sound absorption cavitys, communicating passage comprises at least one microchannel.
Preferably, described sound absorption cavity is cylindrical, elliptical cylinder-shape or taper.
Preferably, described structural matrix is shell structure, and its edge of opening is coated on the periphery of described acoustic board.
(3) beneficial effect
Technique scheme tool of the present utility model has the following advantages:
First, the compound sound-absorption structural that the utility model provides is by can the structural matrix of resonance sound-absorbing and acoustic board form, and acoustic board is compounded to form by board substrate and microperforated panel.Wherein, there is the microperforated panel of multiple through sound-absorbing hole, fit tightly with the board substrate with the cavity that absorbs sound, and board substrate is provided with communicating passage between adjacent sound absorption cavity, between the board substrate of structural matrix and described acoustic board, be provided with 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, and sets up composite sound absorbing measure thus, utilizes microperforated panel to play the effect of power consumption with the resonance sound-absorbing principle of sound absorption cavity; In addition, between sound-absorbing composite board and structural matrix, be separately provided with cavity, this cavity can play resonant interaction with acoustic board, makes the acoustically effective of this structure particularly remarkable, is better than traditional sound absorption mechanism.Meanwhile, above-mentioned sound absorption structure lays respectively on structural matrix, board substrate 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, board substrate adopts the elastic plate 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 board substrate 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 board substrate are formed changes, and then changes the sound absorption frequency of this acoustic board, and then regulates the sound absorption frequency of compound sound-absorption structural, has good adaptability.
Accompanying drawing explanation
Fig. 1 is the vertical view of compound sound-absorption structural 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 compound sound-absorption structural described in the utility model embodiment two.
In figure:
Microperforated panel 1, sound-absorbing hole 11, board substrate 2, sound absorption cavity 21, sound absorption cavity 21a, communicating passage 22, absorptive thin layer 23, structural matrix 3, cavity 31.
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 compound sound-absorption structural described in the present embodiment, and Fig. 2 is the A-A sectional view of Fig. 1.
This compound sound-absorption structural is formed by acoustic board and structural matrix 3 composite joint, has resonating cativty 31 between the two.The microperforated panel 1 that acoustic board is arranged by fitting and board substrate 2 are composited, and this cavity 31 is formed between structural matrix 3 and board substrate 2.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, board substrate 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 compound sound-absorption structural 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 board substrate 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.Meanwhile, be formed at cavity 31 between structural matrix 3 and board substrate 2, thus resonant interaction can be played with acoustic board, promote acoustically effective further.
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 board substrate 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 this programme, structural matrix 3 can be rigid matrix, and also namely adopt rigid material to make, such as, the conventional materials such as metal, timber, glass, organic glass, pottery, gypsum or cement are selected.Shown in figure, this structural matrix 3 is case type structure, and the periphery that its edge of opening is coated on acoustic board sets up reliable annexation, guarantee to form resonance cavity 31 simultaneously, be appreciated that this structure is not limited to the mode shown in figure based on annexation between 3 and acoustic board and realizes, during actual design, structural matrix 3 also can fit in the plate face of board substrate 2, can meet above-mentioned functions needs equally.
In order to promote the acoustically effective of sound-absorbing composite board further, board substrate 2 can be elastic plate matrix, preferably adopts rubber, resin or polycarbonate 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 board substrate 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, in this programme, the integral thickness of acoustic board can be selected as required within the scope of 1mm ~ 30mm, and adaptably, the minimum thickness of absorptive thin layer can be 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 board substrate 2, so that the cavity 21 that absorbs sound is relative to sound-absorbing hole 11 displacement.That is, board substrate 2 in this structure is removable, by movable plate matrix 2, the sound absorption cavity 21 being arranged in board substrate 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 compound sound-absorption structural, 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 compound sound-absorption structural 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) compound sound-absorption structural of the present utility model comprises: elastic plate matrix 2, the microperforated panel 1 be fitted on board substrate with sound absorption cavity 21, and forms the structural matrix 3 of resonating cativty with acoustic board.Handling ease, production cost is low, and acoustically effective is remarkable.
(2) the elastic plate matrix in the utility model makes the weight of whole sound absorption cavity Active Absorption mechanism decline to some extent, and this kind of board substrate is also conducive to absorbing sound the making of cavity simultaneously.
(3) on board substrate, 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) board substrate in compound sound-absorption structural of the present utility model can move, the sound absorption cavity being arranged in board substrate 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 compound sound-absorption structural, is characterized in that, comprises be connected structural matrix and acoustic board; Described acoustic board comprises:
Microperforated panel, which is provided with multiple through sound-absorbing hole; With
Board substrate, 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 board substrate 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 board substrate;
Wherein, cavity is provided with between the board substrate of described structural matrix and described acoustic board.
2. compound sound-absorption structural according to claim 1, is characterized in that, described board substrate is elastic matrix, and described structural matrix is rigid matrix.
3. compound sound-absorption structural according to claim 2, is characterized in that, described board substrate adopts rubber, resin or polycarbonate to make, and described structural matrix adopts metal, timber, glass, organic glass, pottery, gypsum or cement production systD.
4. compound sound-absorption structural 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. compound sound-absorption structural according to claim 4, is characterized in that, the thickness of described acoustic board is 1mm ~ 30mm, and the minimum thickness of described absorptive thin layer is 0.1mm ~ 1mm.
6. compound sound-absorption structural according to claim 4, is characterized in that, along both binding faces, the relative position of described microperforated panel and described board substrate is adjustable, so that described sound absorption cavity is relative to described sound-absorbing hole displacement.
7. compound sound-absorption structural 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. compound sound-absorption structural 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 board substrate, and between adjacent two described sound absorption cavitys, communicating passage comprises at least one microchannel.
9. compound sound-absorption structural according to claim 4, is characterized in that, described sound absorption cavity is cylindrical, elliptical cylinder-shape or taper.
10. compound sound-absorption structural according to claim 1, is characterized in that, described structural matrix is shell structure, and its edge of opening is coated on the periphery of described acoustic board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420850564.XU CN204348328U (en) | 2014-12-26 | 2014-12-26 | A kind of compound sound-absorption structural |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420850564.XU CN204348328U (en) | 2014-12-26 | 2014-12-26 | A kind of compound sound-absorption structural |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204348328U true CN204348328U (en) | 2015-05-20 |
Family
ID=53231582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420850564.XU Active CN204348328U (en) | 2014-12-26 | 2014-12-26 | A kind of compound sound-absorption structural |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204348328U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104616647A (en) * | 2014-12-26 | 2015-05-13 | 北京市劳动保护科学研究所 | Composite sound absorption structure |
| CN112227237A (en) * | 2020-11-10 | 2021-01-15 | 广州地铁设计研究院股份有限公司 | Sound barrier containing air resonant cavity |
| US11608291B2 (en) | 2016-11-04 | 2023-03-21 | Corning Incorporated | Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems |
-
2014
- 2014-12-26 CN CN201420850564.XU patent/CN204348328U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104616647A (en) * | 2014-12-26 | 2015-05-13 | 北京市劳动保护科学研究所 | Composite sound absorption structure |
| US11608291B2 (en) | 2016-11-04 | 2023-03-21 | Corning Incorporated | Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems |
| CN112227237A (en) * | 2020-11-10 | 2021-01-15 | 广州地铁设计研究院股份有限公司 | Sound barrier containing air resonant cavity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104616647A (en) | Composite sound absorption structure | |
| CN104616648A (en) | Composite sound absorption plate | |
| CN205692567U (en) | A kind of low frequency composite sound absorbing device | |
| CN204898916U (en) | Multilayer double entry cavity wide band sound absorption device | |
| CN204348328U (en) | A kind of compound sound-absorption structural | |
| CN107437411B (en) | Low-frequency composite sound absorption device | |
| CN1917036A (en) | Perforation plate for improving sound absorptivity | |
| CN204303339U (en) | A kind of compound sound-absorption structural | |
| CN202093817U (en) | Composite resonant sound absorption structure | |
| CN105719634A (en) | Broadband composite sound absorption structure | |
| CN204102561U (en) | A kind of compound sound-absorption structural | |
| CN104751836A (en) | Magnetic negative-stiffness sound absorption device and method | |
| CN104575484A (en) | Controllable compound sound absorption structure | |
| CN202917165U (en) | A micro perforated plate cell composite noise-reducing structure | |
| CN202090995U (en) | Slice-type silencer | |
| CN204229829U (en) | Broadband compound sound-absorption structural | |
| CN106652989B (en) | Mechanical impedance plate composite porous elastic pipe sound absorption structure | |
| CN204348329U (en) | A kind of sound-absorbing composite board | |
| WO2012155521A1 (en) | Substrate for air intake throttle and air intake throttle comprising the substrate | |
| CN105957513A (en) | Plate-type broadband sound insulation component | |
| CN1917037A (en) | Method for improving perforation plate, and weatherability of sound absorbing structure | |
| CN204360777U (en) | A kind of controlled compound sound-absorption structural | |
| CN206591666U (en) | Absorbing sound and lowering noise partition plate | |
| CN105065337A (en) | Sound absorption structure of air channel | |
| CN201011616Y (en) | Perforated plate for improving acoustic absorption property |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |