ISO 389-9:2009 PDF
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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 specifies test conditions for determining the hearing thresholds of subjects for the purpose of establishing standardized values for reference hearing threshold levels.
| Edition | 2009 |
|---|---|
| Standard Part No | 9 |
| Published Date | 2009 |
| Published By | International Standardization Organisation |
| Page Count | 9 |
