声学。测听设备校准用参照区。第1部分：纯音和耳挂式耳机的参考等效阈声压级。
Acoustics - Reference zero for the calibration of audiometric equipment - Part 1 : reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones.
用激光多普勒干涉测速仪观察直流电流对纯音诱发的基底膜振动速度的影响。
The basilar membrane vibration was elicited by tone and the effect of direct current stimuli were observed by Laser Doppler interference velocimeter.
不同声压级下窄带噪声对纯音同时掩蔽效应的实验结果表明：掩蔽曲线可以用两段直线来近似。
Experiments on simultaneous mask effect where tones were masked by narrow-band noises with different SPL showed that the masking curve could be approximated as two segments of straight line.
我们医院目前用的听力计主要做患者的纯音听阅测试，其它功能很少用。
The audiometer that our hospital uses currently is mainly the sufferer's pure sound to listen to read a test, other functions seldom use.
我们医院目前用的听力计主要做患者的纯音听阅测试，其它功能很少用。
The audiometer that our hospital uses currently is mainly the sufferer's pure sound to listen to read a test, other functions seldom use.
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