An Ultrathin Schroeder Scatterer

A diffuser, ultra-thin technology, applied in the field of acoustics, can solve problems such as unfavorable integration of acoustic devices, and achieve the effect of reducing thickness and facilitating use
CN105913837BActive Publication Date: 2019-09-13NANJING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV
Publication Date
2019-09-13

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Abstract

The invention discloses an ultra-thin Schroeder scatterer, which comprises a substrate, and the substrate is provided with 7×p rows and 7×q columns of square grooves, p and q are integers greater than or equal to 1, and the square grooves are The side length of the groove is 0.48λ, the depth is 0.04λ, and the groove is provided with a square neck. frequency f 0 The design, the corresponding wavelength, and the neck width w of different groove units are different, and the distribution satisfies a specific sequence. The present invention can realize the diffuse reflection of the sound wave in the broadband, and has close diffuse reflection effect compared with the traditional Schroeder scatterer, and can reduce the thickness of the material at the same time, compared with the thickness λ / 2 of the traditional Schroeder, The thickness of the present invention is only λ / 20, which is convenient for practical use.
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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...

Claims

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