NS-EN ISO 389-5:2006
声学 听力测量设备校准的参考零 第5部分:频率范围 8 kHz 至 16 kHz 纯音的参考等效阈值声压级 (ISO 389-5:2006)
Acoustics - Reference zero for the calibration of audiometric equipment - Part 5: Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz (ISO 389-5:2006)