BS EN ISO 389-3:2016规定了适用于puretone骨振动器校准的以下数据 骨传导测听:参考等效阈值振动力水平（RETVFL），对应于 通过骨传导测听法对年轻耳科正常人进行听力测试；骨振子的基本特征和与受试者耦合的方法，以及 机械耦合器；掩蔽噪声的基本特征和应用于设备的基线掩蔽噪声水平 耳朵没有接受测试。ISO 389本部分在听力计校准中的实际应用指南如下: 附录B中给出了RETVFL，是通过一个 在规定的试验条件下，当机械耦合器上使用振动器时，以及在 与乳突位置正常听阈相对应的电压水平。 注1:两个位置之间的参考等效阈值振动力水平差异值 附录C中包含了额头和乳突的信息。注2:ISO 8253-1中规定了进行骨传导测听的推荐程序。交叉引用:ISO 389-1ISO 389-2ISO 389-4IEC 60318-6ANSI S3。13-1972ISO 389-8ISO 4869-1ISO 8253-1IEC 61260-1购买本文件时提供的所有现行修订版均包含在购买本文件中。

BS EN ISO 389-3:2016 specifies the following data applicable to the calibration of bone vibrators for puretone bone-conduction audiometry:reference equivalent threshold vibratory force levels (RETVFL), corresponding to the threshold of hearing of young otologically normal persons by bone-conduction audiometry;essential characteristics of the bone vibrator and the method of coupling to the test subject, and to the mechanical coupler;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.Cross References:ISO 389-1ISO 389-2ISO 389-4IEC 60318-6ANSI S3.13-1972ISO 389-8ISO 4869-1ISO 8253-1IEC 61260-1All current amendments available at time of purchase are included with the purchase of this document.