Particle board resonance sound absorption structure

A technology of resonant sound absorption and particle board, which is applied in the direction of sound-generating devices and instruments, can solve the problems of inconvenient cleaning, etc., and achieve the effects of low cost, wide sound absorption frequency band, and simple manufacturing process

Inactive Publication Date: 2014-11-26
ZISEN ENVIRONMENTAL TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Particle board resonance sound absorption structure
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  • Particle board resonance sound absorption structure

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Embodiment 1

[0064] Select 20-24 mesh particles to make a 10mm particle sound-absorbing board, the particle size range is 0.8-0.9mm, the diameter of the micro-voids is about 0.182-0.2mm, and the porosity is about 25%, and then a cavity 4 is set. The depth M=40mm. The sound-absorbing structure parameters of the micro-perforated plate in comparison are: plate thickness D=10mm, perforation diameter 0.8mm, perforation rate 25%, and cavity depth 50mm.

[0065] Its sound absorption properties are Image 6 It can be seen that the measured performance of the resonant sound-absorbing structure of the particle board is consistent with the theoretical sound-absorbing characteristics of the micro-perforated plate sound-absorbing structure with the same parameters. The difference is that the depth of the cavity is different. , the micro-hole is not a straight line, it is curved and turned, which is equivalent to increasing the depth of the cavity behind it, and the increase is about 10mm obtained thro...

Embodiment 2

[0067] Select 24-40 mesh particles to make a 10mm particle sound-absorbing panel, the particle size range is 0.5-0.8mm, the diameter of the micro-voids is about 0.12-0.182mm, and the porosity is about 25%, and then a cavity 4 is set. The depth M=40mm. The sound-absorbing structure parameters of the micro-perforated plate in comparison are: plate thickness of 10 mm, perforation diameter of 0.15 mm, perforation rate of 25%, and cavity depth of 50 mm.

[0068] Its sound absorption properties are Figure 7 It can be seen that the measured performance of the resonant sound-absorbing structure of the particle board is consistent with the theoretical sound-absorbing performance of the micro-perforated plate sound-absorbing structure with the same parameters. The difference is that the depth of the cavity is different. In the board, the micro-hole is not a straight line, it is curved and turned, which is equivalent to increasing the depth of the cavity behind it, and the increase is ...

Embodiment 3

[0070] Select 40-50 mesh particles to make a 10mm particle sound-absorbing panel, the particle size range is 0.37-0.5mm, the diameter of the micro-voids is about 0.09-0.12mm, and the porosity is about 25%, followed by a closed cavity. The depth is 40mm. The sound-absorbing structure parameters of the micro-perforated plate in comparison are: plate thickness of 10 mm, perforation diameter of 0.12 mm, perforation rate of 25%, and cavity depth of 50 mm.

[0071] Its sound absorption properties are Figure 8 It can be seen that the measured performance of the resonant sound-absorbing structure of the particle board is consistent with the theoretical sound-absorbing performance of the micro-perforated plate sound-absorbing structure with the same parameters. The difference is that the depth of the cavity is different. In the board, the micro-hole is not a straight line, it is curved and turned, which is equivalent to increasing the depth of the cavity behind it, and the increase i...

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Abstract

The invention discloses a particle board resonance sound absorption structure. The particle board resonance sound absorption structure comprises pore plates and a bottom plate located behind the pore plates. Cavities between the bottom plate and the pore plates form the resonance sound absorption structure. The pore plates are particle sound absorption plates. The particle sound absorption plates comprise particles and binding agents. The outer surfaces of the particles are covered with the binding agents to form binding agent layers. Gaps between the particles covered with the binding agents form sound absorption pores. The particle board resonance sound absorption structure can be of a single-layer structure or a double-layer structure or a multilayer structure. The sound absorption performance of the resonance sound absorption structure can be correspondingly influenced by changing the particle sizes of the particle sound absorption plates; the actual measurement performance of the resonance sound absorption structure is approximate to the theoretical sound absorption characteristics of a micro perforated board sound absorption structure with the same parameters, so the corresponding particle board resonance sound absorption structure can be designed according to the application environment. The particle board resonance sound absorption structure is large in sound absorption coefficient, wide in sound absorption frequency band, simple in manufacturing process and capable of being widely applied to various noise control fields such as indoor sound absorption treatment, industrial noise control and railway sound barriers.

Description

technical field [0001] The invention relates to a sound-absorbing structure for noise control, in particular to a particle board resonant sound-absorbing structure. Background technique [0002] At present, perforated plate resonant sound-absorbing structure and micro-perforated plate resonant sound-absorbing structure are widely used in the field of noise control. [0003] The mechanism of the sound-absorbing structure of the perforated plate is: when the sound wave enters the small hole, it excites the air in the cavity to vibrate. If the frequency of the sound wave is equal to the resonance frequency of the structure, the air in the cavity will resonate and turn from friction to heat loss, thereby causing sound absorption. The perforated plate structure can be regarded as many air resonance sound-absorbing structures or Helmholtz resonators connected in parallel. [0004] The sound-absorbing structure of the micro-perforated plate is a box-type structure, which includes...

Claims

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Application Information

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IPC IPC(8): G10K11/172
CPCG10K11/165G10K11/172
Inventor 钱伟鑫沈加曙
Owner ZISEN ENVIRONMENTAL TECHNOLOGY CO LTD
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