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The porous material to the wall of the acoustic treatment. Device reducing agent of noise using this material.
The porous material to the wall of the acoustic treatment. Device reducing agent of noise using this material.
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机译：多孔材料对声学处理的壁。使用这种材料的设备降噪剂。
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摘要
The acoustic material has an acoustic resistance ranging between a product of .2, P and c and a product of 1.5, P and c and an acoustic reactance ranging between a product of .2, P, c and a product of 1, P and c on a range of frequencies between 500 and 5000 hertz, where the P represents a density of outer fluid medium and C represents a speed of sound in the medium. The material is formed from a fibrous fabric material layer (11) and a glass fabric layer (13), where the layers are impregnated with a material such as phenolic thermoplastic resin and epoxy resin. An independent claim is also included for a method for fabricating a porous acoustic material.
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