Acoustics - Reference zero for the calibration of audiometric equipment - Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones (ISO 389-1:1998)
Acoustics - Reference zero for the calibration of audiometric equipment - Part 3: Reference equivalent threshold force levels for pure tones and bone vibrators (ISO 389-3:1994)
Acoustics - Reference zero for the calibration of audiometric equipment - Part 5: Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz (ISO/TR 389-5:1998)
Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions (ISO 389-7:1996)
Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions (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 - Amendment 1: Reference threshold of hearing at 20 Hz and 18 000 Hz under free-field listening conditions and at 20 Hz under diffuse-field listening conditions (ISO 389-7:2005/Amd 1:2016)
Acoustics - Standard reference zero for the calibration of pure-tone air conduction audiometers (ISO 389:1991)
Metallic materials - Knoop hardness test - Part 2: Verification and calibration of testing machines (ISO 4545-2:2005)
Metallic materials - Knoop hardness test - Part 3: Calibration of reference blocks (ISO 4545-3:2005)
Gas analysis - Requirements for certificates for calibration gases and gas mixtures (ISO 6141:2000)
Gas analysis - Preparation of calibration gas mixtures - Gravimetric method (ISO 6142:2001)
Gas analysis - Comparison methods for determining and checking the composition of calibration gas mixtures (ISO 6143:2001)
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