ISO-389-7 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

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