Multilayer sound insulation cover

Abstract

A multi-layer sound insulation cover comprises a plastic foaming sound insulation plate, a metal fiber sound absorption plate and a shell, one surface of the metal fiber sound absorption plate is attached to the plastic foaming sound insulation plate, a certain gap is formed between the other opposite surface of the metal fiber sound absorption plate and the shell, and a telescopic support is arranged on the inner side face of the shell. The area of a cavity between the shell and the metal fiber acoustic board is adjusted through the support, the plastic foaming acoustic board and the metal fiber acoustic board are both flat boards or curved boards, and the shell is an aluminum-plastic board. Through the damping loss effect of the plastic foaming sound insulation plate, the porous sound absorption effect of the metal fiber sound absorption plate and the resonance sound absorption effect of the cavity structure, the noise absorption effect is greatly enhanced, and the noise absorption frequency band is widened.

Description

technical field [0001] The invention relates to the technical field of soundproof covers, in particular to a multilayer soundproof cover. Background technique [0002] With the continuous progress of society, in densely populated and economically developed large and medium-sized cities, convenient living facilities have been continuously constructed, bringing convenience, but at the same time, various noises have caused huge pollution to the living environment of residents. Noise environment can seriously harm people's auditory system, and can also cause heart disease, high blood pressure, memory loss and a series of psychological and mental diseases. Therefore, the control of noise is a very important social issue. In actual engineering, it is usually chosen to prevent the sound insulation cover from closing the equipment outside the noise sources such as motors, transformers, and reactors, so as to prevent the sound waves from continuing to propagate and reduce the noise o...

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Problems solved by technology

Therefore, the control of noise is a very important social issue. In actual engineering, it is usually chosen to prevent the sound insulation cover from closing the equipment outside the noise sources such as motors, transformers, and reactors, so as to prevent the sound waves from continuing to propagate and reduce the noise on the other side of the sound source. noise; in order to obtain better sound insulation performance, traditional sound insulation materials are often bulky and heavy, and most of them are hard materials, which are not easy to be used in subsequent processing, and the sound insulation effect cannot meet people's needs, and there are still a lot of sound waves transmitted through the material. people trouble

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