Sound wave reflection regulation and control device based on acoustic metasurface

Abstract

The invention relates to a sound wave reflection regulation and control device based on an acoustic metasurface. The device is formed by combining a channel, a plurality of cavities which are sequentially arranged at equal intervals and a reflection plate. The reflection plate is arranged at one ends of the cavities. The device provided by the invention has very high reflectivity and a simple structure, and can be used for printing a structure by 3D printing to realize reflection at multiple angles. Compared with the prior art, inherent loss caused by an independent design structure is overcome, the defects that an existing structure is complex in design, high in loss, large in size and high in cost are overcome, simplification of the structure and coupling of sound wave reflection units reduce procedures for preparation of an acoustic function device, the preparation precision is improved, and the performance is further improved.

Description

Technical field [0001] The invention relates to the field of acoustic metasurface materials, and more specifically, to an acoustic wave reflection control device based on the acoustic metasurface. Background technique [0002] Acoustic metasurface is a sub-wavelength ultra-thin two-dimensional surface structure composed of artificial micro-units, and its development has been attracting attention mainly due to its unique physical characteristics such as plane and ultra-thin and its flexible control ability to sound waves. The acoustic metasurface is based on sub-wavelength thickness. Due to its small size, flexible and simple structural design, it is often easier to industrialize and integrate on this basis. The main core is to accurately control the sound wave through the design of a specific sound wave reflection unit. The arrangement of the phases is achieved before, so as to realize the arbitrary manipulation of the sound waves and produce many peculiar phenomena. The design ...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem that the ultrasonic surface described in the above prior art handles large-angle sound field regulation, side lobes and other phenomena will appear, resulting in the problem of reduced reflectivity, and provides an acoustic wave reflection control device based on the ultrasonic surface

[0009] In the previous design of the acoustic wave reflection control device on the supersonic surface, most of the acoustic wave reflection units are designed separately, and the coupling effect between them is often ignored. The research shows that these problems will lead to problems when dealing with large-angle sound field regulation. Phenomena such as side lobes appear, causing the problem that the reflectivity is greatly reduced

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