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ISO 389-9:2009

Acoustics — Reference zero for the calibration of audiometric equipment — Part 9: Preferred test conditions for the determination of reference hearing threshold levels ISO 389-9:2009

Publication date:   May 7, 2009

General information

90.93   Standard confirmed   Oct 9, 2025

ISO

ISO/TC 43 Acoustics

International Standard

13.140   Noise with respect to human beings

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Scope

ISO 389-9:2009 specifies test conditions for determining the hearing thresholds of subjects for the purpose of establishing standardized values for reference hearing threshold levels.

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NOW

PUBLISHED
ISO 389-9:2009
90.93 Standard confirmed
Oct 9, 2025




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