EN ISO 389-3-1998 声学.校正听力设备的基准零级.第3部分:纯音和骨传导振动器的参考等效极限力水平[代替:CEN EN 27566]
Acoustics - Reference Zero for the Calibration of Audiometric Equipment - Part 3: Reference Equivalent Threshold Force Levels for Pure Tones and Bone Vibrators [Superseded: CEN EN 27566]