Low and medium frequency sound insulation meta-material structure prepared by 3D printing

Abstract

The invention discloses a low and medium frequency sound insulation meta-material structure prepared by 3D printing, comprising a unit body, formed by integrating a frame, a connecting body, and a center body. The unit body is composed of single materials. The center body is disposed at the center of the frame, and the connecting body is connected to the frame and the center body, and the thickness of the frame is five times or over five times of that of the connecting body. The low and medium frequency sound insulation meta-material structure prepared by 3D printing is advantageous in that with no counterweight block and no hard base body, the integral density of the meta-material will no exceed 1300kg / m3; use is rapid and convenient, device investment cost is low, process is simple, energy is saved and environment is protected, time consumed is short, and sound isolation of low and medium frequency can be realized.

Description

technical field [0001] The invention belongs to the technical field of medium and low frequency sound insulation metamaterials, and in particular relates to a medium and low frequency sound insulation supermaterial structure which can be prepared by 3D printing technology. Background technique [0002] Acoustic metamaterials refer to a class of man-made materials for acoustics with special properties that do not exist in nature. Specially designed acoustic metamaterials often have special properties that cannot be achieved by traditional materials, such as acoustic imaging and acoustic invisibility. In fact, there is nothing special about the components that make up acoustic metamaterials. Their peculiar properties stem from their specially designed geometric structures and sizes, or the periodicity and specific placement of materials with different properties. Typically, acoustic metamaterials contain various microstructures that can be engineered to exert exotic effects o...

AI Technical Summary

Problems solved by technology

[0004] The current local resonance sound insulation materials are composed of a variety of materials, the design is difficult, the processing technology is very complicated, and the fixing method between different materials is not ideal, which often affects the service life of the material

In addition, such metamaterials often contain counterweights, which make the overall weight large and are not suitable for practical applications

Moreover, the matrix in this type of metamaterial is relatively hard and not easily deformed, so it cannot better meet various clamping environments

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