Reference number
ISO 389-7:2005/Amd 1:2016
© ISO 2024
ISO 389-7:2005/Amd 1:2016
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
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