隔音材料不吸音
隔音材料对减弱透射声能，阻挡声音的传播，就不能如同吸音材料那样多孔、疏松、透气，相反它的材质应该是重而密实，如钢板、铅板、砖墙等一类材料。
Sound insulation materials to reduce transmission sound energy, stop the spread of voice, will not be able to as porous as sound-absorbing material, osteoporosis, breathable, instead it material should be heavy and thick, such as the type of materials such as steel, lead plate, brick wall.
隔音材料材质的要求是密实无孔隙或缝隙；有较大的重量。由于这类隔音材料密实，难于吸收和透过声能而反射能强，所以它的吸音性能差。
Sound insulation material requirement is close-grained without pore or aperture; Have larger weight. Because this kind of sound insulation material is close-grained, difficult to absorb and reflection through sound energy can be strong, so its sound-absorbing performance is poor.
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