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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 noise in substations, which are used to solve the technical problem of poor low-frequency noise blocking effect in the prior art

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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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Embodiment Construction

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0029] For ease of understanding, see Figure 1 ~ Figure 3 , an acoustic metamaterial for blocking substation low-frequency noise provided by the application, including a base material 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 air bubbles 20 inside, and the struct...

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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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