标准摘要
[中文适用范围]： ISO 389的本部分规定了以下数据，适用于纯音骨导测听中骨导接收器的校准： a) 与年轻耳科正常受试者骨导测听听力阈值水平相对应的等效参考阈值力水平（RETVFL）； b) 骨传导接收器的基本特性以及与受试者和机械耦合器的耦合方法； c) 辐射到未测试耳朵的掩蔽噪声的基本特征和基线水平。 附录 B 给出了 ISO 389 本部分在听力计校准中的实际应用指南。 参考周期性力阈值水平是具有指定特性的机械耦合器上的力的振动值，当使用具有指定测试条件的机械耦合器时通过振动器施加，并且其电压对应于现场的通常听力阈值对应、操作、应用于乳突的突出部分。 注 1：前额耦合和乳突耦合的等效参考阈值力水平之间的差异值在附录 C 中给出，以供参考。 注 2：ISO 8253-1 中描述了执行骨导测听的推荐程序。 [外文原描述]： ISO 389-1:2016 specifies the following data applicable to the calibration of bone vibrators for pure-tone bone-conduction audiometry: a) reference equivalent threshold vibratory force levels (RETVFL), corresponding to the threshold of hearing of young otologically normal persons by bone-conduction audiometry; b) essential characteristics of the bone vibrator and the method of coupling to the test subject, and to the mechanical coupler; c) essential characteristics of the masking noise and the baseline masking noise level applied to the ear not under test. Guidance on the practical application of this part of ISO 389 in the calibration of audiometers is given in Annex B. RETVFL is the vibratory force level transmitted to a mechanical coupler of specified characteristics by a vibrator when applied to the mechanical coupler under stated conditions of test and when energized at the voltage level corresponding to the normal threshold of hearing for location on the mastoid prominence. NOTE 1 Values for the differences in reference equivalent threshold vibratory force levels between location on the forehead and mastoid are included for information in Annex C. NOTE 2 Recommended procedures for carrying out bone-conduction audiometry are specified in ISO 8253‑1.
英文名称Acoustics — Reference zero for the calibration of audiometric equipment — Part 3: Reference equivalent threshold vibratory force levels for pure tones and bone vibrators