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

Active Publication Date: 2019-09-13
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • An Ultrathin Schroeder Scatterer
  • An Ultrathin Schroeder Scatterer
  • An Ultrathin Schroeder Scatterer

Examples

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as image 3 and Figure 4 As shown, the ultra-thin Schroeder unit is an ultra-thin acoustic groove unit, the thickness is only λ / 20, and the width is the same as that of the traditional Schroeder groove. The groove structure is as follows Figure 4 As shown, the neck opening and the groove bottom have different widths, the width of the neck opening is w, and the width of the groove bottom is 0.48λ. The resonance effect of the acoustic groove unit is used to produce the same acoustic properties as the traditional groove structure, and the realization is the same as that of the traditional groove structure. Schroeder scatterers have a similar effect. Therefore, the phase feedback of the groove we designed on the surface should satisfy:

[0018]

[0019] Among them, n and m represent the unit of the nth row and the mth column, and modulo represents the r...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K11/20
CPCG10K11/20G10K11/28
Inventor 梁彬景云朱一凡邹欣晔杨京范旭东程建春
Owner NANJING UNIV
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