IEC 60303 Ed. 1.0被替代
I E C Provisional Reference Coupler For The Calibration Of Earphones Used In Audiometry
出版：International Electrotechnical Committee
專家解讀視頻
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.
BIS IS 10779:1984 (R2001) - Identical
SS IEC 303 Ed. 1 (1985) - Identical
UNE 20644:1982 - Identical
BS 4668:1971 - Similar
CEI EN 61303 Ed. 1 (1997) - Identical
