最大声压标准 503322

国际标准。个人音乐播放器耳机最大声压标准，第二部分，分体设备。Soundsystemequipment:Headphonesandearphonesassociatedwithpersonalmusicplayers—MaximumsoundpressurelevelmeasurementmethodologyPart2:Matchingofsetswithheadphonesifeitherorbothareofferedseparately,orareofferedasonepackageequipmentbutwithstandardisedconnectorsbet