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Micro-perforated plate with resonant sound absorption structure

A micro-perforated plate and resonant sound-absorbing technology, which is applied in the direction of sound-emitting devices and instruments, can solve the problems of inconvenient production and use, and achieve the effect of widening the sound-absorbing frequency band and high sound-absorbing performance

Active Publication Date: 2011-05-04
北京绿创声学工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For different sound absorption frequency ranges, choose to use sound insulation and sound absorption panel products with different cavity thicknesses, which is very inconvenient in production and use

Method used

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  • Micro-perforated plate with resonant sound absorption structure
  • Micro-perforated plate with resonant sound absorption structure
  • Micro-perforated plate with resonant sound absorption structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Such as figure 1 As shown, the micro-perforated plate with a resonant sound-absorbing structure in Embodiment 1 includes a rigid wall 1, a micro-perforated plate 2, two rigid sides 3 arranged at both ends of the rigid wall 1, and between the rigid wall 1 and the micro-perforated plate 2 The cavities 4 and flexible or elastic materials 5 respectively provided at both ends of the micro-perforated plate 2 are used to connect the rigid sides 3 . The composition of the flexible or elastic material 5 includes materials such as polymer flexible sound-absorbing materials, springs and soft rubber, forming a flexible or elastic connection between the micro-perforated plate 2 and the rigid side 3 .

[0014] In this embodiment, the rigid wall 1 is mostly a conventional rigid material, which is used to support the micro-perforated plate with a resonant sound-absorbing structure, and if necessary, a supporting framework needs to be provided inside the rigid wall 1 . The materials of...

Embodiment 2

[0017] Such as figure 2 As shown, the micro-perforated plate with a resonant sound-absorbing structure in Embodiment 2 includes a rigid wall 1, a micro-perforated plate 2, a cavity 4 between the rigid wall 1 and the micro-perforated plate 2, and the two ends of the rigid wall 1 are connected to the The two ends of the corresponding micro-perforated plates 2 are directly connected by flexible or elastic materials 5 . The composition of the flexible or elastic material 5 includes polymer flexible sound-absorbing materials, springs, soft rubber and other materials, forming a flexible or elastic connection between the micro-perforated plate 2 and the rigid side 3 .

[0018] In this embodiment, the rigid wall 1 is mostly a conventional rigid material, which is used to support the micro-perforated plate with a resonant sound-absorbing structure, and if necessary, a supporting framework needs to be provided inside the rigid wall 1 . The materials of the micro-perforated plate 2 are...

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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 distancebetween 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 highersound 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 [0001] The invention relates to a sound insulation and sound absorption device, in particular to a micro-perforated plate with a resonant sound absorption structure. Background technique [0002] The advantages of micro-perforated plates with resonant sound-absorbing structure are high sound absorption coefficient, wide absorption frequency band, etc., so they are widely used in various fields of noise control. Ordinary micro-perforated plates with a resonant sound-absorbing structure leave a certain cavity behind the micro-perforated plate, which forms a resonant sound-absorbing structure together with the back plate, but when the parameters of the micro-perforated plate and the cavity behind it are determined, the structure The sound absorption performance is determined. The sound insulation performance of micro-perforated panels with resonant sound-absorbing structure mainly depends on the thickness of the back plate, and the sound absorption performance ...

Claims

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Application Information

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IPC IPC(8): G10K11/172
Inventor 张晓杰沈加曙武显亮
Owner 北京绿创声学工程股份有限公司
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