Reference number
ISO 389-9:2009
ISO 389-9:2009
© ISO 2025
International Standard
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
Edition 1
2009-05
2009-05
ISO 389-9:2009
35251
Published
(Edition 1, 2009)
This publication was last reviewed and confirmed in 2020.
Therefore this version remains current.
Abstract
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.
