Acoustic metamaterial for blocking low-frequency noise of transformer substation and preparation method

An acoustic metamaterial and low-frequency noise technology, which is applied in the direction of sound-emitting devices and instruments, can solve the problems of poor low-frequency noise blocking effect, and achieve the effect of improving the blocking effect

Inactive Publication Date: 2020-12-18
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0005] The present application provides an acoustic metamaterial and a manufacturing method for blocking low-frequency nois

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  • Acoustic metamaterial for blocking low-frequency noise of transformer substation and preparation method
  • Acoustic metamaterial for blocking low-frequency noise of transformer substation and preparation method
  • Acoustic metamaterial for blocking low-frequency noise of transformer substation and preparation method

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[0028]In order to enable those skilled in the art to better understand the solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only It is a part of the embodiments of this application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

[0029]For ease of understanding, please refer toFigure 1 ~ Figure 3 , An acoustic metamaterial for blocking low-frequency noise in substations provided by this application, including a substrate 1;

[0030]The substrate 1 is filled with a structural unit a2 and a structural unit b3. The structural unit a2 includes a liquid ball 21 with bubbles 20 inside, and the structural unit b3 in...

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Abstract

The invention discloses an acoustic metamaterial for blocking low-frequency noise of a transformer substation and a preparation method. The acoustic metamaterial comprises a base material; the base material is filled with a structural unit a and a structural unit b; the structural unit a comprises a liquid ball with bubbles inside; and the structural unit b comprises a metal ball and hard siliconerubber coating the metal ball. According to the technical scheme, through the structural unit a and the structural unit b, the acoustic metamaterial has negative equivalent mass density and negativeequivalent bulk modulus in the same frequency band, a forbidden band can be generated at a low frequency position, double blocking is conducted on propagation of low-frequency noise or a propagation path of the low-frequency noise is changed, and therefore the blocking effect of the low-frequency noise is improved.

Description

technical field [0001] The present application relates to the technical field of noise-reducing materials, in particular to an acoustic metamaterial for blocking low-frequency noise of a substation and a corresponding manufacturing method thereof. Background technique [0002] Low-frequency noise pollution from substations inevitably affects people's normal life in the surrounding environment, and reducing noise pollution is of great significance to improving people's living environment. [0003] At present, due to the characteristics of acoustic metamaterials, acoustic metamaterials have been used to make sound insulation panels, which can effectively control the pollution of low-frequency noise. [0004] For example, the Chinese invention patent CN00106033.3 discloses a composite material with a negative elastic constant and a method for making the same, which has a relatively high density and high rigidity in some soft elastic material regions in the matrix material and e...

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Application Information

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IPC IPC(8): G10K11/162C08L83/04C08L63/00
CPCC08K2201/005C08L63/00C08L83/04G10K11/162C08K9/10C08K7/18
Inventor 彭磊李丽樊小鹏
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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