BS EN ISO 389-9:2009 2010
$102.76
Acoustics. Reference zero for the calibration of audiometric equipment – Preferred test conditions for the determination of reference hearing threshold levels
Published By | Publication Date | Number of Pages |
BSI | 2010 | 16 |
This part of ISO 389 specifies test conditions for determining the hearing thresholds of subjects for the purpose of establishing standardized values for reference hearing threshold levels.