Acoustics - Reference zero for the calibration of audiometric equipment - Part 1 : referenceequivalent threshold sound pressure levels for pure tones and supra-aural earphones.
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。
2
Note that APIname explicitly identifies its equivalent in both reference and topic, even though they are the same (title) in both cases.
注意，APIname明确标明了在引用和主题中的等价物，虽然这里两者相同(title)。
3
Purpose Pass to analysis of relations between the eyeable area and radiate dosage at maze, provide a reference for right choice of the lead equivalent of the protection door.