UNE-EN ISO 389-7:2006 声学 测听设备校准的参考零 第7部分:自由场和扩散场聆听条件下的听力参考阈值(ISO 389-7:2005)
Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions (ISO 389-7:2005)