CN102044239B - Micro-perforated plate with resonant sound absorption structure - Google Patents
Micro-perforated plate with resonant sound absorption structure Download PDFInfo
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- CN102044239B CN102044239B CN 200910235725 CN200910235725A CN102044239B CN 102044239 B CN102044239 B CN 102044239B CN 200910235725 CN200910235725 CN 200910235725 CN 200910235725 A CN200910235725 A CN 200910235725A CN 102044239 B CN102044239 B CN 102044239B
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Abstract
The invention relates to a micro-perforated plate with a resonant sound absorption structure. The micro-perforated plate with the resonant sound absorption structure is characterized by comprising a rigid wall, a micro-perforated plate and a cavity which is formed between the rigid wall and the micro-perforated plate, wherein the two ends of the rigid wall are connected with the two ends of the micro-perforated plate through a flexible or elastic material respectively. In the sound wave absorption process of the micro-perforated plate with the resonant sound absorption structure, the distance between the micro-perforated plate and the rigid wall can be automatically adjusted and a semi-active resonant sound absorption structure is formed in the cavity between the micro-perforated plate and the rigid wall along with the variation of sound wave frequency and the influence of vibrating air flow. Therefore, the micro-perforated plate with the resonant sound absorption structure has higher sound absorption performance in a wider frequency range, the sound absorption frequency band of the micro-perforated plate with the resonant sound absorption structure is greatly expanded, and the defect of a narrower sound absorption frequency band of a sound absorber of the micro-perforated plate with a rigid structure can be overcome. The micro-perforated plate with the resonant sound absorption structure can be widely used for the sound absorber, mufflers and various sound absorption and insulation structures to treat a noise environment caused by air power noise.
Description
Technical field
The present invention relates to a kind of sound insulation sound absorber, particularly about a kind of microperforated panel with resonance sound-absorbing structure.
Background technology
Advantage with microperforated panel of resonance sound-absorbing structure is that acoustical absorption coefficient is high, absorption band is wide etc., therefore is widely used in the every field of noise control.The common microperforated panel with resonance sound-absorbing structure leaves certain cavity behind at microperforated panel, forms resonance sound-absorbing structure with backboard, but in the situation that parameter and the back cavity of microperforated panel are determined, the sound absorbing capabilities of structure has also just been determined.Sound insulation property with microperforated panel of resonance sound-absorbing structure depends primarily on the thickness of backboard, and sound absorbing capabilities then depends on the sound absorption characteristics of acoustic absorbant and the thickness of cavity.In the use procedure, the sound absorption characteristics of acoustic absorbant are changeless, or the thickness of cavity also is changeless, and the distance that namely insulates against sound between backboard and the microperforated panel is changeless, this just causes the sound insulation acoustic board product of a common model, the scope less of its sound absorption frequency.
For this reason, the sound insulation acoustic board product of the multiple different model of having to produce simultaneously makes it have different cavity thickness, to adapt to the scope of wider sound absorption frequency.To different sound absorption frequency ranges, the sound insulation acoustic board product of the different cavity thickness of choice for use is being produced and is being used all very inconvenient like this.
Summary of the invention
For the problems referred to above, the purpose of this invention is to provide and a kind ofly adapt to different sound absorption frequency ranges, and have the microperforated panel with resonance sound-absorbing structure than the high acoustic absorption performance.
For achieving the above object, the present invention takes following technical scheme: a kind of microperforated panel with resonance sound-absorbing structure is characterized in that: it comprises a rigid plane, a microperforated panel and is arranged on cavity between described rigid plane and the microperforated panel; The two ends of described rigid plane are connected by resilient material respectively with the two ends of described microperforated panel; The spacing of described cavity can change with frequency of sound wave and vibratory flow.
The two ends of described rigid plane arrange respectively two rigid sides, and described microperforated panel two ends connect described two rigid sides by described resilient material.
Described resilient material is the flexible acoustic absorbant of macromolecule, spring or soft rubber.
The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is because the position that is connected with rigid sides at the two ends of microperforated panel, be pasted with respectively a flexibility or resilient material, so that the microperforated panel with resonance sound-absorbing structure is in the process that absorbs sound wave, along with the variation of frequency of sound wave and the impact of vibratory flow, can automatically adjust the distance between microperforated panel and the rigid plane, the cavity between microperforated panel and rigid plane forms one and half active resonance sound-absorbing structures.2, the present invention is owing to have half active resonance sound-absorbing structure, therefore can in wider frequency range, have higher sound absorbing capabilities, widened the sound sucting band of the microperforated panel with resonance sound-absorbing structure, had and to remedy the narrower characteristics of rigid structure porous plate acoustic adsorption device sound sucting band.The present invention can be widely used in sound absorber, sound suppressor and all kinds of sound absorption and insulation structure, administers the noise circumstance that is caused by air power noise.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one
Fig. 2 is the structural representation of the embodiment of the invention two
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Embodiment one,
As shown in Figure 1, the microperforated panel with resonance sound-absorbing structure of embodiment one comprise a rigid plane 1, a microperforated panel 2, the cavity 4 between two rigid sides 3, rigid plane 1 that are arranged on rigid plane 1 two ends and the microperforated panel 2 and the flexibility or the resilient material 5 that are connected microperforated panel 2 two ends and are used for being connected rigid sides 3.The formation of flexibility or resilient material 5 comprises the materials such as the flexible acoustic absorbant of macromolecule, spring and soft rubber, and formation flexibility or elasticity are connected between microperforated panel 2 and rigid sides 3.
In the present embodiment, rigid plane 1 mostly is conventional rigid material, is used for supporting the microperforated panel with resonance sound-absorbing structure, also needs in case of necessity in the inboard of rigid plane 1 support frame to be set.The material of microperforated panel 2 mostly is the materials such as steel plate, aluminium sheet, hard plastic board, macromolecule polymeric material, and the pore diameter range of micropore 21 is at 0.1mm～0.8mm on the microperforated panel 2, and percentage of perforation is 0.3%～5%.Cavity 4 between rigid plane 1 and the microperforated panel 2, the thickness when flexibility or resilient material 5 deformation do not occur is about 30mm～200mm.
Present embodiment in use, because the position that the two ends of microperforated panel 2 are connected with rigid sides 3 is pasted with respectively a flexibility or resilient material 5, so absorbing when the microperforated panel with resonance sound-absorbing structure in the process of sound wave, along with the variation of frequency of sound wave and the impact of vibratory flow, can be by flexibility or the resilient material 5 automatic distances of adjusting between rigid plane 1 and the microperforated panel 2, namely adjust the thickness of cavity 4, thereby at cavity 4 interior formation one and half active resonance sound-absorbing structures.
Embodiment two,
As shown in Figure 2, the microperforated panel with resonance sound-absorbing structure of embodiment two comprises the cavity 4 between a rigid plane 1, a microperforated panel 2, rigid plane 1 and the microperforated panel 2, and the two ends of rigid plane 1 directly connect by flexibility or resilient material 5 respectively with the two ends of corresponding microperforated panel 2.The formation of flexibility or resilient material 5 comprises the materials such as the flexible acoustic absorbant of macromolecule, spring, soft rubber, and formation flexibility or elasticity are connected between microperforated panel 2 and rigid sides 3.
In the present embodiment, rigid plane 1 mostly is conventional rigid material, is used for supporting the microperforated panel with resonance sound-absorbing structure, also needs in case of necessity in the inboard of rigid plane 1 support frame to be set.The material of microperforated panel 2 mostly is the materials such as steel plate, aluminium sheet, hard plastic board, macromolecule polymeric material, and the pore diameter range of micropore 21 is at 0.1mm～0.8mm on the microperforated panel 2, and percentage of perforation is 0.3%～5%.
Present embodiment in use, because between the two ends of rigid plane 1 and the two ends of microperforated panel 2, connect with flexibility or resilient material 5 respectively, so absorbing when the microperforated panel with resonance sound-absorbing structure in the process of sound wave, along with the variation of frequency of sound wave and the impact of vibratory flow, can namely adjust the thickness of cavity 4 by flexibility or the resilient material 5 automatic distances of adjusting between rigid plane 1 and the microperforated panel 2, thereby at cavity 4 interior formation one and half active resonance sound-absorbing structures.
In sum, microperforated panel with resonance sound-absorbing structure of the present invention can have higher sound absorbing capabilities in wider frequency range, greatly widen the sound sucting band of the microperforated panel with resonance sound-absorbing structure, can remedy the narrower defective of rigid structure porous plate acoustic adsorption device sound sucting band.The microperforated panel with resonance sound-absorbing structure of present embodiment does not need to add in addition other sound-absorbing porous material.
Microperforated panel with resonance sound-absorbing structure of the present invention can be widely used in sound absorber, sound suppressor and all kinds of sound absorption and insulation structure, administers the noise circumstance that is caused by air power noise.
Claims (3)
1. microperforated panel with resonance sound-absorbing structure is characterized in that: it comprises a rigid plane, a microperforated panel and is arranged on cavity between described rigid plane and the microperforated panel; The two ends of described rigid plane are connected by resilient material respectively with the two ends of described microperforated panel; The spacing of described cavity can change with frequency of sound wave and vibratory flow.
2. a kind of microperforated panel with resonance sound-absorbing structure as claimed in claim 1, it is characterized in that: the two ends of described rigid plane arrange respectively a rigid sides, and described microperforated panel two ends connect described two rigid sides by described resilient material.
3. a kind of microperforated panel with resonance sound-absorbing structure as claimed in claim 1 or 2 is characterized in that: described resilient material is the flexible acoustic absorbant of macromolecule or spring.
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| CN 200910235725 CN102044239B (en) | 2009-10-22 | 2009-10-22 | Micro-perforated plate with resonant sound absorption structure |
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| CN 200910235725 CN102044239B (en) | 2009-10-22 | 2009-10-22 | Micro-perforated plate with resonant sound absorption structure |
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| CN102044239A CN102044239A (en) | 2011-05-04 |
| CN102044239B true CN102044239B (en) | 2013-01-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170342893A1 (en) * | 2013-03-15 | 2017-11-30 | Kohler Co. | Noise suppression systems |
| WO2020114641A1 (en) * | 2018-12-06 | 2020-06-11 | BSH Hausgeräte GmbH | Domestic appliance |
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| CN102332259B (en) * | 2011-10-12 | 2012-07-25 | 中国科学院合肥物质科学研究院 | Adaptive micro-perforated plate sound absorber and real-time micropore adjusting method thereof |
| KR101964644B1 (en) * | 2012-05-10 | 2019-04-02 | 엘지전자 주식회사 | Appliance having a noise reduction device |
| CN102646414A (en) * | 2012-05-14 | 2012-08-22 | 南京大学 | Combined sound absorbing structure based on micropunch and intracavity resonance system |
| CN103971671B (en) * | 2014-04-23 | 2017-12-26 | 北京绿创声学工程股份有限公司 | A kind of compound low-frequency resonance sound absorption structure |
| CN104167204A (en) * | 2014-08-07 | 2014-11-26 | 四川正升声学科技有限公司 | Particle board resonance sound absorption structure |
| CN105161089B (en) * | 2015-06-17 | 2019-10-15 | 成都斯铂润音响设备有限公司 | A kind of sound absorber |
| CN107401225B (en) * | 2017-09-08 | 2023-06-23 | 北京市劳动保护科学研究所 | Flexible particle piled sound absorption and insulation structure |
| CN108492816A (en) * | 2018-05-31 | 2018-09-04 | 山东理工大学 | A kind of two-dimentional male-type photonic crystal structure with microperforated panel |
| CN110264988A (en) * | 2019-05-20 | 2019-09-20 | 吉林大学 | A kind of film holed technique plate composite material |
| CN110230276A (en) * | 2019-07-17 | 2019-09-13 | 盈普声学（惠州）有限公司 | A kind of transparent ventilating noise silencer |
| CN111535723A (en) * | 2020-04-23 | 2020-08-14 | 徐丽丽 | Resonance silencing window |
| CN111564149B (en) * | 2020-04-30 | 2023-11-21 | 中国飞机强度研究所 | Cavity structure noise control method and device based on controllable impedance boundary |
| CN113593512A (en) * | 2021-07-08 | 2021-11-02 | 中南大学 | Multi-cavity composite sound absorption structure |
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| CN201262829Y (en) * | 2008-09-01 | 2009-06-24 | 四川东杨正茂机电设备工程有限公司 | Special noise absorption type soundproof equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170342893A1 (en) * | 2013-03-15 | 2017-11-30 | Kohler Co. | Noise suppression systems |
| US10077707B2 (en) * | 2013-03-15 | 2018-09-18 | Kohler Co. | Noise suppression systems |
| WO2020114641A1 (en) * | 2018-12-06 | 2020-06-11 | BSH Hausgeräte GmbH | Domestic appliance |
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| CN102044239A (en) | 2011-05-04 |
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