Acoustics — Reference zero for the calibration of audiometric equipment — Part 9: Preferred test conditions for the determination of reference hearing threshold levels
声学——测听设备校准用参考零点第9部分:确定参考听阈水平的优选试验条件
发布日期:
2009-05-07
ISO 389-9:2009规定了确定受试者听力阈值的测试条件,以确定参考听力阈值水平的标准值。
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.