Unverified50% confidenceDecision RuleTime unknown
隔音（阻隔声音传播）和吸音（减少反射降低混响）是两个不同物理概念：低频结构传声（如楼上脚步、装修钻墙）必须用高密度隔音板（隔声量Rw≥45dB），聚酯纤维吸音棉几乎无效
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