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Sound absorption structure

A sound-absorbing and sound-absorbing layer technology is applied in the field of noise reduction and noise reduction, which can solve the problems of sound tuning and the inability to reduce the low frequency of the sound source position well.

Pending Publication Date: 2021-06-08
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the purpose of this application is to provide a sound-absorbing structure, which effectively solves the technical problem in the prior art that the 100Hz and 200Hz low-frequency tuned sound cannot be well reduced at the position of the sound source

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0047]In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer " and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or im...

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Abstract

The invention relates to the technical field of sound attenuation and noise reduction and particularly relates to a sound absorption structure. The structure comprises a box body, a resistive sound absorption layer and a reactive sound absorption layer, wherein the resistive sound absorption layer is made of a porous sound absorption material; a Helmholtz resonance cavity array is arranged in the resistant sound absorption layer; the resistive sound absorption layer and the reactive sound absorption layer are both mounted in the box body; a plurality of through holes are formed in the first surface of the box body; and the resistive sound absorption layer is arranged between the reactive sound absorption layer and the first surface of the box body. According to the structure, through the resistance sound absorption layer with the Helmholtz resonance cavity array, special peak elimination design can be carried out on low-frequency tuned sounds of 100Hz and 200Hz, which are difficult to control, of an indoor transformer substation, the frequency pertinence is high, and a technical problem that the low-frequency tuned sounds of 100Hz and 200Hz at the sound source position cannot be well reduced in the prior art is effectively solved.

Description

technical field [0001] The present application relates to the technical field of sound attenuation and noise reduction, in particular to a sound absorbing structure. Background technique [0002] The main noise source of the indoor substation is the main transformer, which is installed in the civil engineering workshop of the main transformer room. Usually the wall surface of the main transformer room is smooth, and the internal reverberation sound is relatively serious, which causes the intensity of the noise source radiated to the external acoustic environment to increase. [0003] There are subjectively perceivable tuned sounds at 100Hz and its harmonics in urban indoor substation transformer noise. Among them, the sound absorption and noise reduction effect of traditional porous sound-absorbing materials is obvious for medium and high frequency (above 300Hz), but for 100Hz and 200Hz sound-tuning, the sound absorption and noise reduction effect of traditional porous soun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162G10K11/168B32B25/20B32B25/10B32B27/12B32B27/32B32B33/00
CPCG10K11/162G10K11/168B32B25/20B32B25/10B32B27/12B32B27/32B32B33/00B32B2307/102
Inventor 王毅潘海毅林其雄许杰王立峰洪炜平蔡蒂邹伟煜陈宇健李阔吴国玥梁为林伟斌黄威
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD