Sound absorption structure and device

Abstract

The invention provides a sound absorption structure and device. The sound absorption structure comprises: a body having a sound wave incident surface; at least part of the partition pieces are arranged in the body at intervals in the first direction parallel to the sound wave injection face, at least part of the partition pieces are arranged in the body at intervals in the second direction parallel to the sound wave injection face, and the first direction intersects with the second direction; a plurality of resonant cavities are defined by the partitions and the body, and the resonant cavities are configured to absorb sound waves through resonance; wherein at least one resonant cavity can be bent; moreover, during bending, the length of the at least one resonant cavity in the first direction and / or the second direction is changed. According to the sound absorption structure, the sound absorption structure can be well adapted to different curved surfaces by configuring the bendable resonant cavity, so that a large amount of installation space is saved, and the application scene and the application range of the sound absorption structure are greatly widened.

Description

technical field [0001] The invention relates to the technical field of sound absorption, in particular to a sound absorption structure and device. Background technique [0002] Noise pollution is one of the three major pollutions in the world today. With the development of society, the impact of noise on human society is becoming more and more serious. Traditional sound-absorbing materials have obvious suppression effects on noise in the middle and high frequency bands, but for large-wavelength low-frequency noise effect is very limited. [0003] Acoustic metamaterials are artificial composite structural materials that have extraordinary acoustic properties that natural materials do not have (such as good absorption of mid-low frequency noise, ultra-thin thickness, wide control frequency band, etc.). Its special acoustic performance depends on artificial functional units that can be freely designed according to the noise spectrum characteristics. Among them, sound-absorbin...

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Problems solved by technology

[0004] These structures have a good absorption effect on low-frequency noise, and their internal structures are highly designed, but the structure of the sound absorbing body is relatively simple, usually a rectangular sound-absorbing flat panel, but there are many problems in matching the rectangular flat panel with the noise application environment. Big problem, when the wall to which the sound-absorbing material needs to be attached is a curved surface or the shape of the device that needs to be sound-insulated is irregular, it is difficult for the rectangular sound-absorbing panel to fit such a wall and device

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