标准摘要
[中文适用范围]: 本报告适用于助听器的性能特征。考虑佩戴者对助听器性能的声学影响的测量方法非常重要,特别是当测量结果用于协助助听器验配时。使用本报告获得的信息可能比与型式批准和质量控制相关的出版物(例如 IEC 出版物 118-0:助听器:第 0 部分:电声特性测量)提供的信息更与助听器的验配相关。 IEC 出版物 118-7:助听器,第 7 部分:用于交付质量检验的助听器性能特征测量。本报告中指定的方法需要使用人体模型等设备来模拟佩戴者的存在。头部和躯干模拟器的报告工作正在进行中。在就人体模型达成一致之前,我们发现有必要为助听器的模拟现场测量制定某些准则。本报告中描述了推荐的方法。 [外文原描述]: Describes methods for a test which simulates the acoustical effects of a median adult wearer on the performance of a hearing aid. Establishes certain guidelines for simulated in situ measurements of hearing aids; it describes a simplified method for simulated in situ measurements of hearing aids and a description for determination of the directivity index (DI) of directional microphones in hearing aids in the horizontal plane. In addition this second edition now specifies tolerances. Conformance to the specifications in this International Standard is demonstrated only when the result of a measurement, extended by the actual expanded uncertainty of measurement of the testing laboratory, lies fully within the tolerances specified in this International Standard extended by the values for Umax
英文名称Electroacoustics - Hearing aids - Part 8: Methods of measurement of performance characteristics of hearing aids under simulated [in situ] working conditions