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一、前言 玻璃棉、矿渣棉和岩棉等无机纤维材料具有吸声系数高、防火、防腐、防蛀、容重轻和不易老化等特点,是噪声控制工程中广泛应用的多孔性吸声材料。但是由于这类材料质地松疏、纤维性脆、强度低,使用时纤维容易散落,因此需要有护面层,目前使用得最多的是玻玻纤维布。实践表明,一般的玻璃纤维布对多孔材料的吸声是无甚影响的,但对于在风速较高的消声器或具有一定振动的环境下使用时,这种护面层仍会使吸声体的纤维逸出。
I. INTRODUCTION Inorganic fiber materials such as glass wool, slag wool and rock wool have the characteristics of high sound absorption coefficient, fire prevention, corrosion prevention, moth proof, light weight and easy aging. They are widely used porous sound-absorbing materials in noise control engineering. However, due to the loose texture of these materials, fiber brittle, low strength, the use of fiber easy to fall, so the need for a protective layer, currently used most of the glass fiber cloth. Practice shows that the general glass fiber cloth on the porous material sound absorption is not affected, but for high-speed muffler or with a certain vibration environment, the surface layer will still make the absorber Fiber escaped.