ISO 389-7:2005 Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions
ISO 8253-1:2010 Acoustics - Audiometric test methods - Part 1: Pure-tone air and bone conduction audiometry
GOST R ISO 8253-2-2012 history
2012GOST R ISO 8253-2-2012 Acoustics. Audiometric test methods. Part 2. Sound field audiometry with pure-tone and narrow-band test signals