Sound wave reflection regulation and control device based on acoustic metasurface

A control device and metasurface technology, applied in the direction of sound-producing instruments, instruments, etc., can solve the problems of side lobes and reduced reflectivity, and achieve the effect of improving reflectivity, high reflectivity, and small volume

Pending Publication Date: 2020-11-13
GUANGDONG UNIV OF TECH
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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 ref...

Method used

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  • Sound wave reflection regulation and control device based on acoustic metasurface
  • Sound wave reflection regulation and control device based on acoustic metasurface
  • Sound wave reflection regulation and control device based on acoustic metasurface

Examples

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Embodiment 1

[0046] This embodiment provides an acoustic wave reflection control device based on an acoustic metasurface. Such as figure 1 As shown, the device is composed of 8 acoustic wave reflecting units 1 arranged in sequence at equal distances; the opening directions of the channels 1.1 of all acoustic wave reflecting units 1 are the same, and the widths of the channels 1.1 are different.

[0047] The distance between every two adjacent acoustic wave reflecting units is 0.03λ, where λ is the acoustic wave wavelength.

[0048] The change rule of the width of the channels 1.1 of the acoustic wave reflecting units 1 arranged at equal distances in sequence is gradually decreasing.

[0049] The discrete phase step length of every two adjacent acoustic wave reflecting units 1 is π / 4.

[0050] Such as figure 2 As shown, the acoustic wave reflection unit 1 is composed of a channel 1.1, 4 cavities 1.2 and a reflecting plate 1.3 arranged adjacently at equal distances; the cavity walls of the reflecti...

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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 ...

Claims

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Application Information

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IPC IPC(8): G10K11/36
CPCG10K11/36
Inventor 张欣张开颜刘月嫦姚源卫吴福根
Owner GUANGDONG UNIV OF TECH
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