Reference levels for narrow - band masking noise 窄带掩蔽噪声的基准级
2.
Acoustics - reference zero for the calibration of audiometric equipment - reference levels for narrow - band masking noise 声学.测听设备的校准参照区.掩蔽噪声的参考等级
3.
Acoustics - reference zero for the calibration of audiometric equipment - part 4 : reference levels for narrow - band masking noise 声学校准测听设备的基准零级第4部分:窄带掩蔽噪声的基准级
4.
Acoustics . reference zero for the calibration of audiometric equipment . part 4 : reference levels for narrow - band masking noise 声学.听力测定仪器的校准用基准0 .第4部分:窄频带遮蔽噪声的基准级
5.
Acoustics - reference zero for the calibration of audiometric equipment - part 4 : reference levels for narrow - band masking noise iso 389 - 4 : 1994 ; german version en iso 389 - 4 : 1998 声学.音响设备校正零点参考基准.第4部分:窄带遮敝噪