纯音听力计 meaning in English

pure tone audiometer
pure tonecaudiometen

Audiometers . part 1 : pure - tone audiometers
听力计:第一部分:纯音听力计
Verification regulation of pure - tone audiometers
纯音听力计检定规程
Acoustics . reference zero for the calibration of audiometric equipment . part 2 : reference equivalent threshold sound pressure levels for pure tones and insert earphones
声学.纯音听力计设备校正的参考零点.插入式耳机和纯音调用参考等效域值声压级