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.
在耦合腔中采用传递函数法进行双水听器接收复声压的一致性校准，并采用易地交换测量消除声场不均匀性的影响。
And the influence of the uneven acoustic field upon the calibration is cancelled by the means of a reciprocal measurement technique.
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