Sound absorption unit and sound absorption device

A technology of sound absorption and acoustic impedance, which is applied in the direction of sound-emitting devices and instruments, and can solve problems such as environmental pollution, health hazards, and high cost of low-frequency noise reduction

Pending Publication Date: 2021-03-02
南京光声超构材料研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Based on this, it is necessary to provide an improved sound-absorbing unit for the traditional porous sound-absorbing materials, which have high cost of low-frequency noise reduction, short life, easy pollution of the environment and health hazards during the preparation process.

Method used

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  • Sound absorption unit and sound absorption device
  • Sound absorption unit and sound absorption device
  • Sound absorption unit and sound absorption device

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Embodiment Construction

[0046] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0047] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "front", "rear", "circumferential" and s...

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Abstract

The invention provides a sound absorption unit and a sound absorption device. The sound absorption unit comprises at least one quarter-wavelength tube bank body and at least one Helmholtz resonator row body which are arranged in a stacked mode in the preset direction; the quarter-wave tube bank body comprises a plurality of quarter-wave tubes arranged side by side, and each quarter-wave tube is provided with a first open end and a first closed end which are oppositely arranged; the Helmholtz resonator row body comprises a plurality of Helmholtz resonators arranged side by side, and each Helmholtz resonator is provided with a second open end and a second closed end which are oppositely arranged; the first open ends and the second open ends are adopted to jointly form a sound wave incident surface of the sound absorption unit; and in the preset frequency band, the overall acoustic impedance of the sound absorption unit is matched with the acoustic impedance of the air. The sound absorption unit can achieve a good sound absorption effect at a low frequency band, space can be saved, the preparation cost is reduced, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of sound-absorbing devices, in particular to a sound-absorbing unit and a sound-absorbing device. Background technique [0002] Traditional sound-absorbing materials include porous sound-absorbing materials. Porous sound-absorbing material is a material with a network structure composed of interconnected or closed holes, and the boundaries or surfaces of the holes are composed of pillars or plates. A typical pore structure can be a two-dimensional structure formed by the aggregation of a large number of polygonal pores on a plane. This type of polygonal hole is similar to the hexagonal structure of a honeycomb and is called a "honeycomb" material. More generally, a three-dimensional structure formed by a large number of polyhedral-shaped holes in space is usually called a "foam" material. If the holes are connected, they are called open holes; if each hole is completely separated from the surrounding holes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162
CPCG10K11/162
Inventor 黄唯纯解龙翔刘乐陈建栋钟雨豪颜学俊钱斯文卢明辉马仁杰杨俊鸿
Owner 南京光声超构材料研究院有限公司
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