Impedance composite type sound absorbing plate

Abstract

The invention relates to an impedance composite type sound absorbing plate, which comprises a face plate (1), sound absorbing materials (2) and a back plate (3), and is characterized in that: small holes (1.1.1), mounting holes (1.1.2) and positioning holes (1.3.1) of the face plate are arranged on the face plate (1); the sound absorbing materials (2) comprise glass wool (2.1) and glass mat (2.2); the glass mat (2.2) covers the outer part of the glass wool (2.1); glass mat mounting holes (2.2.1) are arranged on upper and lower surfaces of the glass mat (2.2); a plurality of small holes (3.1) and mounting holes (3.3) of the back plate are arranged on the back plate (3); positioning holes (3.2) of the back plate are arranged at four corners of the back plate (3); and the plurality of small holes (1.1.1) of the face plate and the plurality of small holes (3.1) of the back plate are arranged in a staggered manner. The impedance composite type sound absorbing plate has the advantages of convenience for installation, attractive appearance and tidiness, and noise inside a cabin can be effectively eliminated.

Description

technical field [0001] The invention relates to an impedance composite sound-absorbing panel, which is mainly installed on the steel wall in the cabin for absorbing the noise inside and outside the cabin. Background technique [0002] As a sound insulation material, the sound-absorbing panel is usually installed on the inner wall of the cabin to absorb and reduce external noise. On board, due to the limited space in the cabin, the distance between the cabins is short, the steel walls between the cabins are thin, and the noise problem is very serious. Therefore, sound-absorbing panels must be used to reduce noise. The current marine sound-absorbing panels are usually composed of a panel, a back panel, and sound-absorbing materials sandwiched between the panel and the back panel. However, it has the following defects: [0003] 1. Although there are small holes on the back panel of the current marine sound-absorbing panels, which can absorb external noise, but because the cabi...

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Problems solved by technology

[0003] 1. Although there are small holes on the back panel of the current marine sound-absorbing panels, which can absorb external noise, but because the cabins are small and relatively closed, the internal echo is relatively large, and the current marine sound-absorbing panels The surface of the panel is closed, so the sound in the room cannot be exhausted

[0004] 2. The installation and fixation of the current marine sound-absorbing panels is extremely inconvenient. It is necessary to weld a large number of angle steels and pad irons with the top and bottom profiles on site, and then connect them with the original sound-absorbing panels, which not only wastes a lot of manpower, but also increases the working time. Moreover, the sound-absorbing system in the cabin is composed of several sound-absorbing panels spliced ​​together, and the installation holes processed on site are not neat, which looks very unattractive

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