Compound-type sound-absorbing wedge

Abstract

The invention discloses a compound-type sound-absorbing wedge. The compound-type sound-absorbing wedge comprises a plurality of transversely and parallelly arranged wedge main bodies (10), each wedgemain body (10) comprises a base part (1), and the front end of each base part (1) is provided with a tip part (2); the rear ends of any two adjacent base parts (1) are connected; the interior of a shell of each wedge main body (10) is filled with a sound-absorbing material; and the sound-absorbing wedge is provided with at least one sound-absorbing cotton plate (3). According to the disclosed compound-type sound-absorbing wedge, a metal sound-absorbing wedge can have the good absorbing effect to low-frequency sound waves, and the absorbing performance to high-frequency sound waves can be improved; and the problem, existing on the metal sound-absorbing wedge, that high-frequency sound waves are prone to reflecting is effectively solved, the whole sound-absorbing effect of the sound-absorbing wedge is improved, wide application and popularization are facilitated, and significant production practice significance is achieved.

Description

technical field [0001] The invention relates to the technical field of acoustic noise reduction, in particular to a composite sound-absorbing wedge. Background technique [0002] The sound-absorbing wedge is a special sound-absorbing structure used in the anechoic chamber, and its structure can usually be divided into two parts: the tip and the base. The sound-absorbing wedge has a structure that gradually increases from the top to the bottom, so that while satisfying a large sound-absorbing area, it also achieves a good match with the air impedance (that is, the principle of gradual transition), thereby satisfying the effective absorption of low-frequency sound waves . [0003] Generally speaking, when the sound-absorbing material appears at the peak position of the sound wave (that is, the quarter-wavelength position), the maximum absorption rate (≥0.99%) will appear. The acoustic characteristics of the sound-absorbing wedge are often expressed by the sound pressure refl...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the purpose of the present invention is to provide a composite sound-absorbing wedge, which can make the metal sound-absorbing wedge not only have a better absorption effect on low-frequency sound waves, but also improve the absorption performance on high-frequency sound waves, effectively It solves the problem that high-frequency sound waves are easily reflected on the metal sound-absorbing wedge, improves the overall sound-absorbing effect of the sound-absorbing wedge, and is conducive to widespread application, which has great practical significance in production

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