A Porous Mixed Channel Ultra-Broadband Sound Absorbing Structure

A hybrid channel, 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 extending the sound transmission path, small size, and improving sound absorption performance.

Active Publication Date: 2022-07-05
SOUTHWEST UNIV
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  • Summary
  • 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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  • A Porous Mixed Channel Ultra-Broadband Sound Absorbing Structure
  • A Porous Mixed Channel Ultra-Broadband Sound Absorbing Structure
  • A Porous Mixed Channel Ultra-Broadband Sound Absorbing Structure

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Embodiment Construction

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] It is to be understood that, when used in this specification and the appended claims, the terms "comprising" and "comprising" indicate the presence of the described features, integers, steps, operations, elements and / or components, but do not exclude one or The presence or addition of a number of other features, integers, steps, operations, elements, components, and / or sets thereof.

[0024] It is also to be understood that the termin...

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Abstract

The invention discloses an ultra-wideband sound absorption structure of a porous mixed channel, which comprises a cover plate, a side wall and a bottom plate. The acoustic back cavity is provided with a transverse partition plate and a longitudinal partition plate, and the transverse partition plate and the longitudinal partition plate are intersected to divide the sound absorption back cavity into a plurality of sub-cavities, and a first partition plate and a second partition plate are arranged in the sub-cavities. Partition plate, the first partition plate and the second partition plate are both arranged on the transverse partition plate, and the first partition plate and the bottom plate are provided with a gap, and the two ends of the second partition plate are respectively connected to the first partition plate It is connected with the longitudinal partition to divide the sub-cavities into coiled channels and straight channels. The structure is simple, the volume is small, and a plurality of coiled channels and straight channels are connected in parallel to realize low-frequency ultra-wideband sound absorption.

Description

technical field [0001] The invention relates to the technical field of noise control devices, in particular to a porous mixed channel ultra-wideband sound absorption structure. Background technique [0002] The use of thin and light 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, different types of sound-absorbing metamaterials such as thin-film sound-absorbing metamaterials, Fabry-Pérot and Helmholtz resonant sound-absorbing metamaterials, and porous acoustic metamaterials have demonstrated that the introduction of acoustic metamaterial ideas into 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, they are s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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 UNIV
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