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ISO-389-7
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Complete Document History
Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions
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Complete Current Edition:
3RD EDITION - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions - Oct. 1, 2019
Obsolete Revision Information:
FOR 2ND EDITION AMENDMENT 1 SEE - ISO-389-7-AM1 - July 15, 2016
2ND EDITION - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions - Nov. 1, 2005
1996 EDITION - ACOUSTICS - REFERENCE ZERO FOR - Dec. 15, 1996