CN1805005A - Microporous sound absorbing structure - Google Patents
Microporous sound absorbing structure Download PDFInfo
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- CN1805005A CN1805005A CN 200610023242 CN200610023242A CN1805005A CN 1805005 A CN1805005 A CN 1805005A CN 200610023242 CN200610023242 CN 200610023242 CN 200610023242 A CN200610023242 A CN 200610023242A CN 1805005 A CN1805005 A CN 1805005A
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Abstract
The invention relates to a micro-hole sound-absorbing structure in the field of environment noise control technology. It comprises one or a plurality of sound-absorbing structure units, a supporter and a back board. The sound-absorbing structure unit comprises two layers of net and an interlayer particle; the particle size is bigger than the size of the net-hole; the particle is partly embedded in the net hole. One or a plurality of sound-absorbing structure units is fixed on the back board to form the micro-hole sound-absorbing structure. There is the air gap between the sound-absorbing structure unit and the back board.
Description
Technical field
The present invention relates to a kind of sound absorption structure, especially a kind of microporous sound absorbing structure that is used for the air-borne sound absorption belongs to neighbourhood noise control technology field.
Background technology
The main at present fibrous material making sound absorption structure that adopts can reach high sound absorbing capabilities usually in than wider frequency.Major defect is that the anti-environmental aging performance of fibrous material is not good, generally mineral wool of Shi Yonging and glass fibre, still harmful material.In addition, obtain good low frequency absorption performance, required thickness has with the sound wave appearance works as, and tends to make the sound absorption structure size very big.The acoustic absorbant of alternative fiber has expanded material, as foamed aluminium, and foamed ceramics etc., because foamed material is not penetrating gas, the low frequency absorption performance of this class material is all undesirable.Another is to adopt microperforated panel, and method commonly used is that drill diameter is made into microperforated panel less than the hole of 0.5mm on solid plate, and lining forms sound absorption structure with back of the body cavity.The shortcoming of microperforated absorber is that sound sucting band is wide inadequately usually, and in addition, the boring amount that needs is often very big, makes processing cost than higher.Aluminum fiberboard is a kind of novel sound absorption structure that can take into account sound absorbing capabilities and environment, but production cost is very high.In the prior art, application number is the patent of invention of 96199598 " manufacture method of abatvoix and the abatvoix with sandwich construction ", be to constitute, be difficult to the design composition and reach wide band good sound absorption structure by support plate and overlayer that is covered with this support plate and the middle layer that contains coarse porosity; Application number is " sqouynd absorption lowering noise net arrangement " utility model patent of 99217277, and all at the protective seam silk screen of 0.05-0.8 millimeter, the stack stratum reticulare is the 0-1 layer by the aperture, and netting thick is the absorbent treatment silk screen composition of 0-1 millimeter, can not form to reach micron-sized hole.Application number is that the patent of invention of 200510023452 " double-face sound-absorbing contacting oral cavity sound shield without cotton " mainly adopts two-layer aluminum fiber thin plate and two layers of porous plates, and major defect is that cost of manufacture is than higher.Application number is the utility model patent of 200420025074 " perforation acoustic foam aluminium ", by the method for punching again on foamed aluminium, improves sound absorbing capabilities, has the high shortcoming of cost of manufacture equally.
Summary of the invention
In order to overcome the deficiencies in the prior art and defective, the invention provides a kind of microporous sound absorbing structure, this structure is made up of the particle between net and the net, and the size by appropriate selection mesh size and particle makes to stay micro pores between the two; The combination of mesh and particle by different size and material can obtain having the net-particle-stratum reticulare structure of different acoustic impedance characteristics, can also the stratum reticulare structure of different acoustic impedance characteristics be made up, and adapts to the requirement of different sound absorption characteristics.This structure has the same micro-pore of microperforated panel, and number of apertures is a lot, the good sound absorbing capabilities that can reach at the wide frequency ranges that comprises low frequency, and also cost of manufacture is relatively low.
The present invention is achieved through the following technical solutions.The present invention includes one or more absorbent treatment structural units, support and backboard, wherein the absorbent treatment structural unit is made up of two layers of mesh and middle one deck particle.The size of particle is bigger slightly than mesh size, and forms average hole less than 0.05mm between the mesh; Net can be weaved by metal or nonmetal wire, also can be formed by metal or non-metal board boring.The size dimension of each layer particle is even, and is evenly distributed between the two layers of mesh.The absorbent treatment structural unit minimum number of forming sound absorption structure is one, also can be a plurality of, leave the clearance between absorbent treatment structural unit and the backboard; Can leave the clearance between the absorbent treatment structural unit, the gas gap of also can not leaving a blank.Under the situation in the gas gap of not leaving a blank between the absorbent treatment structural unit, shared one throws the net between two absorbent treatment structural units, forms the alternate layout with particle of net, i.e. one deck net, one deck particle, one deck net again, one deck particle ...Net and particle can adopt bonding each other, clinkering, or the mode of mechanical grip is fixed.Mesh is shaped as round, triangle, quadrilateral, or other polygon.The net of different layers structure can adopt identical shaped mesh, also can adopt difform mesh.The particle that is adopted can be glass, the grains of sand, carbon granules, rubber grain, fubril granule, foam metal particle or foam grain.Can use the particle of different materials at different absorbent treatment structural units.One or more absorbent treatment structural units back side by side form microporous sound absorbing structure by being supported and fixed on the backboard.The microporous sound absorbing structure of moulding can be a writing board shape, cylindrical so, circular conical surface shape, sphere shape, or other geometric surface shape.The clearance of leaving between absorbent treatment structural unit and the backboard is suitable with the sound absorption wave length of sound, in order to regulate the sound sucting band position.Backboard can be metal or nonmetal plate, also can be building wall.
The invention has the beneficial effects as follows, the absorbent treatment structural unit that the present invention adopts two layers of mesh and middle one deck particle to form, form the micro-pore between mesh and the particle, save the required bore process of microperforated panel, saved processing cost, and have the dirigibility of adopting one or more absorbent treatment structural unit combinations, adapt to the especially low frequency absorption requirement of various broadbands.By selecting the suitable net and the material of particle, can satisfy various sound absorptions and barrier propterty requirement.The present invention is simple in structure, and low cost of manufacture has tangible economic benefit and social benefit.
Description of drawings
Fig. 1 is the synoptic diagram of sound absorption structure of the present invention;
Fig. 2 is the structural representation of no clearance between the absorbent treatment structural unit of the present invention.
Embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As shown in Figure 1, the present invention is made up of one or more absorbent treatment structural units 1, support 2 and backboard 3.Wherein, absorbent treatment structural unit 1 comprises two layers of mesh 4 and middle layer particle 5.The size of particle 5 is bigger slightly than the mesh size of net 4, and particle 5 is partially submerged into mesh, forms average hole less than 0.05mm between particle 5 and the mesh.Leave clearance 6 between absorbent treatment structural unit 1 and the backboard 3; Can leave clearance 6 between the absorbent treatment structural unit 1, the gas gap 6 of also can not leaving a blank.As shown in Figure 2, under the situation in the gas gap 6 of not leaving a blank between the absorbent treatment structural unit 1, shared one throws the net 4 between two absorbent treatment structural units 1, form net 4 and particle 5 alternate layouts, promptly one deck net 4, one deck particle 5, one deck net 4 again, one deck particle 5 ...Particle 5 sizes in each absorbent treatment structural unit 1 are even, and are evenly distributed on the net 4.Net 4 can be weaved by metal or nonmetal wire, also can be formed by metal or non-metal board boring, and mesh is shaped as round, triangle, quadrilateral, or other polygon.The net 4 of different absorbent treatment structural units 1 can adopt identical shaped mesh, also can adopt difform mesh.The particle 5 that is adopted can be glass, the grains of sand, carbon granules, rubber grain, fubril granule, foam metal particle or foam grain.Net 4 can adopt bonding each other with particle 5, clinkering, or the mode of mechanical grip is fixed.Can use the particle 5 of different materials at different absorbent treatment structural units 1.One or more absorbent treatment structural units 1 are fixed on the backboard 3 by supporting 2 side by side, form microporous sound absorbing structure.The microporous sound absorbing structure of moulding can be a writing board shape, cylindrical so, circular conical surface shape, sphere shape, or other geometric surface shape.The width of the clearance of leaving between absorbent treatment structural unit 1 and the backboard 36 is suitable with the sound absorption wave length of sound, in order to regulate the sound sucting band position.Backboard 3 can be metal or nonmetal plate, also can be building wall.
Claims (6)
1, a kind of microporous sound absorbing structure, comprise one or more absorbent treatment structural units (1), support (2) and backboard (3), it is characterized in that absorbent treatment structural unit (1) comprises two layers of mesh (4) and middle layer particle (5), the size of particle (5) is bigger slightly than the mesh size of net (4), form average hole between particle (5) and the mesh less than 0.05mm, one or more absorbent treatment structural units (1) back side by side are fixed on the backboard (3) by supporting (2), form microporous sound absorbing structure, leave clearance (6) between absorbent treatment structural unit (1) and the backboard (3); Can leave clearance (6) between the absorbent treatment structural unit (1), the gas gap (6) of also can not leaving a blank.
2, microporous sound absorbing structure according to claim 1, it is characterized in that not leaving a blank between the described absorbent treatment structural unit (1) under the situation of gas gap (6), shared one throw the net (4) between two absorbent treatment structural units (1), form net (4) and the alternate layout of particle (5), be one deck net (4), one deck particle (5), one deck net (4), one deck particle (5) again ...
3, microporous sound absorbing structure according to claim 1 is characterized in that described particle (5) can be glass, the grains of sand, carbon granules, rubber grain, fubril granule, foam metal particle or foam grain.Particle (5) size in each absorbent treatment structural unit (1) is even, and is evenly distributed on the net (4).
4, microporous sound absorbing structure according to claim 1 is characterized in that described net (4) can be weaved by metal or nonmetal wire, also can be formed by metal or non-metal board boring, and mesh is shaped as circle, triangle, quadrilateral, or other polygon; Net (4) in the different absorbent treatment structural units (1) can adopt identical shaped mesh, also can adopt difform mesh, and net (4) adopts bonding each other with particle (5), clinkering, or the mode of mechanical grip is fixed.
5, microporous sound absorbing structure according to claim 1 is characterized in that described backboard (3) is metal or nonmetal plate, also can be building wall; The microporous sound absorbing structure of moulding can be a writing board shape, cylindrical so, circular conical surface shape, sphere shape, or other geometric surface shape.
6, microporous sound absorbing structure according to claim 1 is characterized in that the width of the clearance (6) left between described absorbent treatment structural unit (1) and the backboard (3) is suitable with the sound absorption wave length of sound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100232428A CN100492491C (en) | 2006-01-12 | 2006-01-12 | Microporous sound absorbing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100232428A CN100492491C (en) | 2006-01-12 | 2006-01-12 | Microporous sound absorbing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1805005A true CN1805005A (en) | 2006-07-19 |
| CN100492491C CN100492491C (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100232428A Expired - Fee Related CN100492491C (en) | 2006-01-12 | 2006-01-12 | Microporous sound absorbing structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103915090A (en) * | 2012-12-31 | 2014-07-09 | 中国科学院声学研究所 | Broadband noise reduction porous-material acoustic liner and equipment |
| WO2016019640A1 (en) * | 2014-08-07 | 2016-02-11 | 四川正升声学科技有限公司 | Particle plate resonance sound absorption structure |
| CN104715749B (en) * | 2015-03-17 | 2018-01-19 | 中国科学院合肥物质科学研究院 | Acoustic impedance adjusting means and adjusting method based on adaptive micro-perforated plate sound absorber |
| CN110005086A (en) * | 2019-03-29 | 2019-07-12 | 广州市五羊艺冠声学材料有限公司 | A kind of ultramicropore abatvoix |
-
2006
- 2006-01-12 CN CNB2006100232428A patent/CN100492491C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103915090A (en) * | 2012-12-31 | 2014-07-09 | 中国科学院声学研究所 | Broadband noise reduction porous-material acoustic liner and equipment |
| WO2016019640A1 (en) * | 2014-08-07 | 2016-02-11 | 四川正升声学科技有限公司 | Particle plate resonance sound absorption structure |
| CN104715749B (en) * | 2015-03-17 | 2018-01-19 | 中国科学院合肥物质科学研究院 | Acoustic impedance adjusting means and adjusting method based on adaptive micro-perforated plate sound absorber |
| CN110005086A (en) * | 2019-03-29 | 2019-07-12 | 广州市五羊艺冠声学材料有限公司 | A kind of ultramicropore abatvoix |
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| Publication number | Publication date |
|---|---|
| CN100492491C (en) | 2009-05-27 |
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Granted publication date: 20090527 Termination date: 20120112 |