07/30094858 DC
BS ISO 3747 聲學(xué) 用聲壓測定噪聲源的聲功率級和聲能級 混響環(huán)境中現(xiàn)場使用的工程/勘測方法
BS ISO 3747. Acoustics. Determination of sound power levels and sound energy levels of noise sources using sound pressure. Engineering/survey methods for use in situ in a reverberant environment