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Porous mixing channel ultra-wideband sound absorption structure

A hybrid channel and ultra-wideband technology, applied in the direction of sound-generating equipment, instruments, etc., can solve the problem of difficult to achieve high-efficiency sound absorption effect of low-frequency and ultra-wideband sound waves, and achieve the effect of prolonging the sound transmission path, high-efficiency absorption, and simple structure.

Active Publication Date: 2021-01-05
SOUTHWEST UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In summary, limited by the layout space and working environment in the project, it is difficult for traditional sound-absorbing structures to achieve high-efficiency sound-absorbing effects on low-frequency and ultra-wideband sound waves

Method used

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used ...

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Abstract

The invention discloses a porous mixing channel ultra-wideband sound absorption structure which comprises a cover plate, side walls and a bottom plate; a plurality of via holes are formed in the coverplate; the cover plate, the side walls and the bottom plate are connected to form a sound absorption back cavity; transverse partition plates and longitudinal partition plates are arranged in the sound absorption back cavity, and the transverse partition plates and the longitudinal partition plates are arranged in an intersecting mode and used for dividing the sound absorption back cavity into aplurality of sub-cavities. A first partition plate and a second partition plate are arranged in each sub-cavity, the first partition plate and the second partition plate are both arranged on the corresponding transverse partition plate, a gap is formed between the first partition plate and the bottom plate, and the two ends of the second partition plate are connected with the first partition plateand the longitudinal partition plate correspondingly so as to divide the sub-cavity into a coiling channel and a straight channel. The structure is simple, the size is small, and low-frequency ultra-wideband sound absorption is achieved by connecting a plurality of coiled channels and straight channels in parallel.

Description

technical field [0001] The invention relates to the technical field of noise control devices, in particular to an ultra-broadband sound-absorbing structure of a porous mixing channel. Background technique [0002] The use of thin and thin resonant acoustic metamaterials for sound absorption and noise reduction is a current research hotspot. However, the current research on the design of resonant sound-absorbing structures has encountered a bottleneck that needs to be broken through. First of all, different kinds of sound-absorbing metamaterials such as thin-film sound-absorbing metamaterials, Fabry-Pérot and Helmholtz resonant sound-absorbing metamaterials, and porous acoustic metamaterials have proved that the idea of ​​acoustic metamaterials can be introduced The effective type of traditional sound-absorbing materials also has certain limitations. For example, although thin-film acoustic metamaterials can absorb low-frequency sound waves with a small mass and thickness, t...

Claims

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Application Information

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IPC IPC(8): G10K11/162G10K11/172
CPCG10K11/162G10K11/172
Inventor 吴飞黄威胡嫚姚凌云高鸣渊陈文渊
Owner SOUTHWEST UNIVERSITY
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