Ultra-thin Schroder scatterer

Abstract

Disclosed in the invention is an ultra-thin Schroder scatterer comprising a substrate. Square grooves arranged at 7*p rows and 7*q columns are formed in the substrate, wherein the p and q are integers larger than or equal to 1; and the length of side of each square groove is 0.48 lambda and the depth of each groove is 0.04 lambda. The grooves are provided with square necks; the side length of each square neck is smaller than that of the square groove and the depth of the neck is 0.01 lambda, wherein the lambda is a corresponding wavelength, for a certain central frequency f0 design, of the scatterer. The neck width w of different groove units are different and the distribution meets a specific sequence of number. According to the invention, diffuse reflection of acoustic waves can be realized at a broadband. Compared with the traditional Schroder scatterer, the provided ultra-thin Schroder scatterer has a closer diffuse reflection effect. Meanwhile, the material thickness can be reduced. Compared with the traditional Schroder unit having the thickness of lambda / 2, the provided Schroder scatterer has the thickness of lambda / 20, so that the Schroder scatterer can be used conveniently in practice.

Description

technical field [0001] The invention relates to an ultrathin Schroeder scatterer, which belongs to the field of acoustics. Background technique [0002] The traditional Schroeder acoustic structure is provided with multiple grooves, and the width of the notch and the bottom of the groove are the same, resulting in a relatively thick Schroeder acoustic structure, generally λ / 2, such as figure 1 and figure 2 As shown, it is not conducive to the integration of acoustic devices. Contents of the invention [0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an ultra-thin Schroeder scatterer, the thickness of which can be 1 / 10 of the traditional Schroeder scatterer, and the volume is smaller. [0004] Technical solution: In order to achieve the above object, an ultra-thin Schroeder scatterer of the present invention includes a substrate, and the substrate is provided with 7×p rows and 7×q columns of square g...

AI Technical Summary

Problems solved by technology

[0002] The traditional Schroeder acoustic structure is provided with multiple grooves, and the width of the notch and the bottom of the groove are the same, resulting in a relatively thick Schroeder acoustic structure, generally λ / 2, such as figure 1 and figure 2 As shown, it is not conducive to the integration of acoustic devices

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