Lightweight honeycomb type low-frequency sound insulation metamaterial structure

Abstract

The invention, which relates to the field of metamaterial sound insulation, discloses a lightweight honeycomb type low-frequency sound insulation metamaterial structure which comprises an upper frame,a lower frame, elastic thin films arranged between the two frames, a mass blocks attached to the films and a homogeneous thin plate covering the outer sides of the frames. Each frame is composed of aplurality of regularly arranged hexagonal honeycomb units, and the honeycomb units of the upper frame and the lower frame are in one-to-one correspondence in position. The mass blocks are attached tothe elastic thin films of all honeycomb units, the mass blocks can be all identical or different in type and are arranged in a combined mode according to a certain rule, wherein the shapes of the mass blocks comprise a circular ring shape, a cylindrical shape and a circular truncated cone shape. The used honeycomb type acoustic metamaterial is superior to a traditional sound insulation material and has very excellent sound insulation performance in a low-frequency band; the overall quality of a structure can be controlled effectively by selecting a light frame material, so that the purposes of light weight and low-frequency sound insulation are achieved. The lightweight honeycomb type low-frequency sound insulation metamaterial structure has very broad application prospects in the fieldsof automobiles, buildings and the like.

Description

technical field [0001] The invention relates to the sound insulation field of acoustic metamaterials, in particular to a lightweight honeycomb low-frequency sound insulation metamaterial structure. Background technique [0002] There are serious noise problems in many places in our life. Whether it is in the fields of transportation such as automobiles, subways, and aviation, or in the field of life such as architectural decoration, the troubles caused by noise are becoming more and more serious. The sound insulation walls on both sides of expressways and subway tracks, the sound insulation materials of KTV boxes, and the front wall of cars, carpet sound insulation pads, etc., can attenuate the transmission of noise to a certain extent, but they cannot effectively isolate low-frequency noise. Solving the problem of low-frequency noise has always been a very difficult challenge. Low-frequency noise has a long wavelength and strong penetrating ability. Traditional materials of...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a lightweight honeycomb low-frequency sound-insulating metamaterial structure, which can effectively solve the noise problem in the low-frequency band, and at the same time meet

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