CN105719634A - Broadband composite sound absorption structure - Google Patents
Broadband composite sound absorption structure Download PDFInfo
- Publication number
- CN105719634A CN105719634A CN201410734903.2A CN201410734903A CN105719634A CN 105719634 A CN105719634 A CN 105719634A CN 201410734903 A CN201410734903 A CN 201410734903A CN 105719634 A CN105719634 A CN 105719634A
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- Prior art keywords
- absorption
- cover plate
- broadband
- sound
- compound sound
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 73
- 239000002131 composite material Substances 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims description 23
- 150000001875 compounds Chemical class 0.000 claims description 19
- 239000011148 porous material Substances 0.000 claims description 7
- 239000010409 thin film Substances 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 5
- 239000004753 textile Substances 0.000 claims description 4
- 241000251468 Actinopterygii Species 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 238000005187 foaming Methods 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000006262 metallic foam Substances 0.000 claims description 3
- 229910052755 nonmetal Inorganic materials 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 241000283080 Proboscidea <mammal> Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
The invention relates to the technical field of sound absorption boards, and discloses a broadband composite sound absorption structure. The structure comprises a cover plate, a bottom plate, side walls, and a separating plate. The cover plate and the bottom plate are arranged at an interval in an opposite manner. The side walls are connected with the cover plate and the bottom plate, thereby forming a back cavity. The cover plate is provided with a plurality of first perforations. The separating plate is disposed in the back cavity, is tightly attached to the inner wall of the cover plate, the bottom plate and/or the side walls, and enables the back cavity to be divided into a plurality of sound absorption rooms. Each sound absorption room is communicated with the first perforations. According to the invention, the cover plate, the side walls and the bottom plate are employed to form the back cavity, and the separating plate is used for dividing the back cavity into the plurality of sound absorption rooms. The plurality of sound absorption rooms form a resonance sound absorption system, and the system can absorb wideband sound waves, thereby improving the absorption performance. Moreover, the structure is simple, and is easy to machine.
Description
Technical field
The present invention relates to acoustic board technical field, particularly relate to a kind of broadband compound sound-absorption structural.
Background technology
Traditional perforated plate resonance absorption structure, its perforated plate has behind each hole closing cavity, is equivalent to " Helmholtz " resonator of many parallel connections, when the frequency of incidence wave and the resonant frequency of system are consistent, namely produces resonance.Now, the reciprocal air vibration at perforated plate hole place, its amplitude reaches maximum, and rubs and damp also maximum, and acoustic energy is changed into heat energy because of viscous loss, and namely acoustic energy dissipation reaches maximum.This is the advantage of perforated plate resonance absorption structure.But this structure also has the shortcoming that it is intrinsic, and it main disadvantage is that: the selectivity of frequency is strong, that is to say that its sound sucting band is narrow, near resonant frequency, only just can have a good sound absorbing capabilities, and off-resonance frequence, its acoustically effective is substantially deteriorated.Widening effective wide band sound absorption of monolayer porous plate acoustic adsorption device, a kind of method is to adopt the microperforated panel soundabsorbing construction of MULTILAYER COMPOSITE.But multi-layer compound structure significantly increases the complexity of structure, too increase material and cost simultaneously, practical engineering application is additionally subjected to the restriction of space length.Another kind of method is to place sound-absorbing material at the microperforated panel back side, but the sound-absorbing material increased can bring the secondary pollution of structure.Having is exactly reduce penetration hole diameter further again, the theory according to Mr. Ma Dayou, when the penetration hole diameter of microperforated panel is less than 0.1 millimeter, is expected to reach the band limit of porous plate acoustic adsorption device.But Conventional machining methods cannot realize the processing of ultramicropore aperture microperforated panel, the such as laser boring of other processing methods, because of the increase of punch density, production cost also can be greatly increased, and is not suitable for batch production.
Summary of the invention
(1) to solve the technical problem that
It is an object of the invention to provide a kind of broadband compound sound-absorption structural with wider acoustically effective and simple in construction, it is easy to processing.
(2) technical scheme
In order to solve above-mentioned technical problem, the present invention provides a kind of broadband compound sound-absorption structural, including: cover plate, base plate, sidewall and demarcation strip；Described cover plate and base plate relative spacing are arranged；Described sidewall connects described cover plate and sidewall, forms a back of the body chamber；Described cover plate is provided with multiple first perforation；Described demarcation strip is arranged in back of the body chamber, and fits tightly with the inwall of described cover plate, base plate and/or sidewall, and described back of the body chamber is separated into multiple absorption chamber；Each described absorption chamber all connects with described first perforation.
Wherein, described absorption chamber is cuboid, cylinder, vertebral body or irregular body.
Wherein, described cover plate is made up of porous material, thin-film material, sound absorption paper or textile material.
Wherein, described thin-film material is polyethylene or polypropylene.
Wherein, described porous material is metal foaming material or non-metal foam material.
Wherein, generally circular in shape, the square or hexagon of described cover plate.
Wherein, described first perforation is circular port, square opening, diamond hole, hex hole, fish scale shape hole, slotted eye, Shan slot apertures or irregularly-shaped hole.
Wherein, described sidewall is made up of metal material or nonmetallic materials.
Wherein, described base plate is made up of metal material or nonmetallic materials.
Wherein, the described demarcation strip of part is provided with multiple second perforation.
(3) beneficial effect
Broadband provided by the invention compound sound-absorption structural, adopts cover plate, sidewall and base plate to constitute back of the body chamber, and uses demarcation strip that back of the body chamber is separated into multiple absorption chamber, multiple absorption chambers constitute resonance sound-absorbing system, it is possible to the sound wave bandwidth of absorption, improve absorbent properties, and simple in construction, it is easy to processing.
Accompanying drawing explanation
Fig. 1 is the three-dimensional structure diagram (removing a sidewall) of the embodiment of the present invention；
Fig. 2 is the sectional view in Fig. 1 along A-A direction；
Fig. 3 is the broadband compound sound-absorption structural Experimental Comparison figure with the compound sound-absorption structural of prior art of the embodiment of the present invention.
In figure, 1: cover plate；2: sidewall；3: base plate；4: demarcation strip；5: absorption chamber；10: back of the body chamber；11: the first perforation；41: the second perforation.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following instance is used for illustrating the present invention, but is not limited to the scope of the present invention.
Shown in reference Fig. 1 and 2, the broadband compound sound-absorption structural of the present invention, including: cover plate 1, sidewall 2, base plate 3 and demarcation strip 4.Cover plate 1 is provided with multiple first perforation 11, and in the present embodiment, with reference to shown in Fig. 1, cover plate 1 adopts microperforated panel, and the first perforation 11 is micro-circular port.Cover plate 1 and base plate 3 relative spacing are arranged, with reference to shown in Fig. 2, and cover plate 1 and the parallel setting of base plate 3.The cross section of sidewall is enclosed construction, it is preferred to " O ", " mouth " or sphere of movements for the elephants shape structure, and sidewall 2 connects cover plate 1 and sidewall 3, forms a back of the body chamber 10.The quantity of demarcation strip 4 is multiple, and the shape of demarcation strip 4 can be varied.Demarcation strip 4 is arranged in back of the body chamber 10, and fit tightly with the inwall of cover plate 1, base plate 3 and/or sidewall 2, back of the body chamber 10 is separated into multiple absorption chamber 5 by demarcation strip 4, the degree of depth of multiple absorption chambers 5 is incomplete same, and the degree of depth of absorption chamber 5 refers to medial surface and the innermost vertical height of absorption chamber of cover plate 1.With reference to shown in Fig. 2, back of the body chamber 10 is separated to form the absorption chamber 5 of the different depths such as two-chamber, three chambeies or multi-cavity.Absorption chamber 5 is cuboid, cylinder, vertebral body or irregular body etc..Each absorption chamber 5 all connects with the first perforation 11, and sound wave is flowed into absorption chamber 5 from the first perforation 11, absorption chamber 5 absorb.
Preferably, cover plate 1 is made up of porous material, thin-film material, sound absorption paper or textile material.Wherein, thin-film material is polyethylene or polypropylene.Porous material is metal foaming material or non-metal foam material.
Preferably, the diameter of the first perforation 11 is 0.1～3mm, it is preferred to 0.1mm, 0.5mm, 0.8mm, 1mm, 3mm.The thickness of slab of cover plate 1 is 0.5～10mm, it is preferred to use 0.5mm, 0.8mm, 1mm, 2mm, 3mm, 4mm, 5mm, 10mm.The degree of depth in sound absorption back of the body chamber is 5～80mm, it is preferable that 5mm, 10mm, 15mm, 20mm, 50mm, 80mm.
It should be noted that base plate 3 and sidewall 2 can be served as by the solid metope of building, a back of the body chamber 10 closed can be formed together with cover plate 1.
Preferably, the depth ordered distribution of absorption chamber 5.With reference to shown in Fig. 1, in the absorption chamber 5 that the absorption chamber 5 that three degree of depth are different is set with successively or degree of depth is big, accommodate the little absorption chamber of multiple degree of depth 5.
Preferably, generally circular in shape, square, hexagon, the ellipse of cover plate 1 or other shapes.
Preferably, sidewall 2, base plate 3 and demarcation strip 4 are made by metal material or nonmetallic materials.
Preferably, demarcation strip 4 can also be made up of porous material, thin-film material, sound absorption paper or textile material, and part demarcation strip 4 is provided with multiple second perforation 41.With reference to shown in Fig. 1, the shallower absorption chamber 5 of the degree of depth completely by wave absorption, can not be bored a hole by second and 41 sent to by sound wave and attempt deeper absorption chamber 5, deeper absorption chamber 5 fully absorbed by sound wave.
It should be noted that the first perforation 11 and the second perforation 41 can circular ports as described in above-described embodiment.Can also is that square opening, diamond hole, hex hole, fish scale shape hole, slotted eye, Shan slot apertures or irregularly-shaped hole.
With reference to shown in Fig. 3, Fig. 3 illustrates the acoustical absorptivity comparison diagram of the broadband sound-absorbing composite board structure of the present invention and the sound absorption structure of prior art, and in experimentation, the trial of both back of the body chambers is 50mm.Wherein, B curve represents the acoustical absorptivity of prior art, and C curve represents the acoustical absorptivity of the broadband sound-absorbing composite board structure of the present invention, it is apparent that the sound-absorbing composite board structure of the present invention has wider acoustical absorptivity from Fig. 3.
The present invention adopts demarcation strip that back of the body chamber is separated to form multiple sound absorption chamber, and multiple sound absorption chambeies form resonator system, widen the wide band sound absorption of sound absorption structure.Invention increases demarcation strip and back of the body chamber is separated into multiple absorption chamber, the degree of depth of multiple absorption chambers is incomplete same, it is prone to processing, easy for installation, acoustically effective is good, eliminates the technique on the cover board boring micropore, has saved processing cost, and the structure of absorption chamber does not have strict form to limit, and has good motility.Further, part demarcation strip has the second perforation, contributes to forming double-deck or multilamellar sound absorption structure, can expand the wide band sound absorption of sound absorption structure further.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. a broadband compound sound-absorption structural, it is characterised in that including: cover plate, base plate, sidewall and demarcation strip；Described cover plate and base plate relative spacing are arranged；Described sidewall connects described cover plate and sidewall, forms a back of the body chamber；Described cover plate is provided with multiple first perforation；Described demarcation strip is arranged in back of the body chamber, and fits tightly with the inwall of described cover plate, base plate and/or sidewall, and described back of the body chamber is separated into multiple absorption chamber；Each described absorption chamber all connects with described first perforation.
2. broadband as claimed in claim 1 compound sound-absorption structural, it is characterised in that described absorption chamber is cuboid, cylinder, vertebral body or irregular body.
3. broadband as claimed in claim 1 compound sound-absorption structural, it is characterised in that described cover plate is made up of porous material, thin-film material, sound absorption paper or textile material.
4. broadband as claimed in claim 3 compound sound-absorption structural, it is characterised in that described thin-film material is polyethylene or polypropylene.
5. broadband as claimed in claim 3 compound sound-absorption structural, it is characterised in that described porous material is metal foaming material or non-metal foam material.
6. broadband as claimed in claim 1 compound sound-absorption structural, it is characterised in that generally circular in shape, the square or hexagon of described cover plate.
7. broadband as claimed in claim 1 compound sound-absorption structural, it is characterised in that described first perforation is circular port, square opening, diamond hole, hex hole, fish scale shape hole, slotted eye, Shan slot apertures or irregularly-shaped hole.
8. broadband as claimed in claim 1 compound sound-absorption structural, it is characterised in that described sidewall is made up of metal material or nonmetallic materials.
9. broadband as claimed in claim 1 compound sound-absorption structural, it is characterised in that described base plate is made up of metal material or nonmetallic materials.
10. broadband as claimed in claim 1 compound sound-absorption structural, it is characterised in that the described demarcation strip of part is provided with multiple second perforation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734903.2A CN105719634A (en) | 2014-12-04 | 2014-12-04 | Broadband composite sound absorption structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734903.2A CN105719634A (en) | 2014-12-04 | 2014-12-04 | Broadband composite sound absorption structure |
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| Publication Number | Publication Date |
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| CN105719634A true CN105719634A (en) | 2016-06-29 |
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| CN201410734903.2A Pending CN105719634A (en) | 2014-12-04 | 2014-12-04 | Broadband composite sound absorption structure |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106833422A (en) * | 2017-03-16 | 2017-06-13 | 天津市浩迪橡塑科技有限公司 | Sound-absorbing material structural damping plate and preparation method thereof |
| CN107401225A (en) * | 2017-09-08 | 2017-11-28 | 北京市劳动保护科学研究所 | The sound absorption and insulation structure that a kind of flexible particle is piled up |
| CN107622764A (en) * | 2016-07-13 | 2018-01-23 | 于泳林 | A kind of noise absorber |
| CN108086065A (en) * | 2017-11-23 | 2018-05-29 | 中铁二院工程集团有限责任公司 | A kind of rail resonance sound-absorbing device |
| CN108630188A (en) * | 2018-04-28 | 2018-10-09 | 中国铁道科学研究院铁道建筑研究所 | The processing technology of sound absorption structure, acoustic absorptive member, package system and sound absorption structure |
| CN110313030A (en) * | 2017-02-24 | 2019-10-08 | Mra系统有限责任公司 | Multilayer acoustic liner |
| CN110517659A (en) * | 2019-08-20 | 2019-11-29 | 西安交通大学 | A kind of multiple-unit manifold type microperforated panel broad band low frequency sound absorption structure and its design method |
| CN110626364A (en) * | 2019-09-24 | 2019-12-31 | 中车株洲电力机车有限公司 | Sound insulation structure of cooling system of railway vehicle and manufacturing method of sound insulation structure |
| CN110763085A (en) * | 2019-09-17 | 2020-02-07 | 南京航空航天大学 | Micro-perforated orthogonally-arranged rectangular tube sandwich sound absorption and energy absorption composite structure |
| CN110838281A (en) * | 2019-10-11 | 2020-02-25 | 西安交通大学 | Multi-cavity sandwich type micro-perforated plate noise elimination structure |
| CN111792044A (en) * | 2019-04-02 | 2020-10-20 | 空中客车运营简化股份公司 | Assembly for forming sound absorbing material |
| CN112185327A (en) * | 2020-09-16 | 2021-01-05 | 西安交通大学 | Micro-seam low-frequency sound absorption unit and nested broadband sound absorption structure with same |
| CN113393826A (en) * | 2021-06-10 | 2021-09-14 | 中国人民解放军国防科技大学 | Low-frequency broadband acoustic metamaterial composite sound absorption structure and preparation method thereof |
| EP4120243A4 (en) * | 2020-03-13 | 2023-08-09 | Pixie Dust Technologies, Inc. | Sound absorbing structure and sound absorbing wall |
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| GB1490923A (en) * | 1975-06-23 | 1977-11-02 | Short Brothers & Harland Ltd | Sound-absorbing structures |
| US4787473A (en) * | 1985-02-07 | 1988-11-29 | Fraunhofer Gesellschaft | Sound attenuating box |
| EP0405581A1 (en) * | 1989-06-30 | 1991-01-02 | Nitto Boseki Co., Ltd. | Sound absorber |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107622764A (en) * | 2016-07-13 | 2018-01-23 | 于泳林 | A kind of noise absorber |
| CN110313030A (en) * | 2017-02-24 | 2019-10-08 | Mra系统有限责任公司 | Multilayer acoustic liner |
| CN106833422A (en) * | 2017-03-16 | 2017-06-13 | 天津市浩迪橡塑科技有限公司 | Sound-absorbing material structural damping plate and preparation method thereof |
| CN107401225A (en) * | 2017-09-08 | 2017-11-28 | 北京市劳动保护科学研究所 | The sound absorption and insulation structure that a kind of flexible particle is piled up |
| CN108086065A (en) * | 2017-11-23 | 2018-05-29 | 中铁二院工程集团有限责任公司 | A kind of rail resonance sound-absorbing device |
| CN108630188A (en) * | 2018-04-28 | 2018-10-09 | 中国铁道科学研究院铁道建筑研究所 | The processing technology of sound absorption structure, acoustic absorptive member, package system and sound absorption structure |
| CN111792044A (en) * | 2019-04-02 | 2020-10-20 | 空中客车运营简化股份公司 | Assembly for forming sound absorbing material |
| CN110517659A (en) * | 2019-08-20 | 2019-11-29 | 西安交通大学 | A kind of multiple-unit manifold type microperforated panel broad band low frequency sound absorption structure and its design method |
| CN110517659B (en) * | 2019-08-20 | 2022-07-12 | 西安交通大学 | Multi-unit coupling type micro-perforated plate low-frequency broadband sound absorption structure and design method thereof |
| CN110763085A (en) * | 2019-09-17 | 2020-02-07 | 南京航空航天大学 | Micro-perforated orthogonally-arranged rectangular tube sandwich sound absorption and energy absorption composite structure |
| CN110626364A (en) * | 2019-09-24 | 2019-12-31 | 中车株洲电力机车有限公司 | Sound insulation structure of cooling system of railway vehicle and manufacturing method of sound insulation structure |
| CN110838281A (en) * | 2019-10-11 | 2020-02-25 | 西安交通大学 | Multi-cavity sandwich type micro-perforated plate noise elimination structure |
| EP4120243A4 (en) * | 2020-03-13 | 2023-08-09 | Pixie Dust Technologies, Inc. | Sound absorbing structure and sound absorbing wall |
| CN112185327A (en) * | 2020-09-16 | 2021-01-05 | 西安交通大学 | Micro-seam low-frequency sound absorption unit and nested broadband sound absorption structure with same |
| CN113393826A (en) * | 2021-06-10 | 2021-09-14 | 中国人民解放军国防科技大学 | Low-frequency broadband acoustic metamaterial composite sound absorption structure and preparation method thereof |
| CN113393826B (en) * | 2021-06-10 | 2024-01-26 | 中国人民解放军国防科技大学 | Low-frequency broadband acoustic metamaterial composite sound absorption structure and preparation method |
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Application publication date: 20160629 |
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