IEC 60303 : 1ED 70被替代
I E C PROVISIONAL REFERENCE COUPLER FOR THE CALIBRATION OF EARPHONES USED IN AUDIOMETRY
出版：International Electrotechnical Committee
专家解读视频
The coupler is recommended as a simple and ready means for the exchange of specifications on audiometers and for calibration of earphones used in audiometry, even though the sound pressure developed by an earphone is not, in general, the same in the coupler as in a persons ear. This publication has the status of a report.
BS 4668(1971) : 1971 - Similar to
UNE 20644 : 1982 - Identical
NEN 10303 : 1971 - Identical
BIS IS 10779 : 1984(R2001) - Identical
BS 4668(1971) : 1971 - Similar to
NEN 10303 : 1971 - Identical
BIS IS 10779 : 1984(R2001) - Identical
UNE 20644 : 1982 - Identical
