吸音材料的结构特征
吸音材料的结构特征是:材料中具有大量的、互相贯通的、从表到里的微孔,也即具有一定的透气性。
Structure characteristics of sound-absorbing material is: material has a lot of, the interpenetration, from the table to the pores, which has certain permeability.
当声波入射到多孔材料表面时,引起微孔中的空气震动,由于摩擦阻力和空气的黏滞阻力以及热传导作用,将相当一部分声能转化为热能,从而起吸音作用。
When sound waves incident to the surface of a porous material, makes the air inside the pores, due to the viscous friction and air resistance and heat transfer effect, will be part of the sound energy into heat energy, sound-absorbing effect thereby.
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