名词解释
消声器两端声压级的差值。
消声sound attenuation；moise reduction sound deadening
名词解释消声sound attenuation；moise reduction sound deadening
房间吸声量room absorption
名词解释房间吸声量room absorption
噪声自然衰减量natural attenuation quantity of noise
名词解释噪声自然衰减量natural attenuation quantity of noise
