范围本美国国家标准规定了一种用于代表正常语音的测试信号 国际语音测试信号（ISTS），以及 测量空气传导助听器的信号处理特性。测量 用于推导估计的插入增益（EIG）。用于描述助听器的特征 在生产、供应和交付过程中，推导耦合器增益的程序和要求 还规定了IEC 60318-5中定义的2 cm3耦合器。该程序使用类似语音的测试信号，助听器设置为 为单个最终用户或制造商推荐的典型最终用户编程 适用于一系列平坦、中等倾斜或陡峭倾斜的听力图，以便 特征可与佩戴者在典型用户设置下获得的特征相比较。 本标准的目的是确保在助听器上进行相同的测量 按照描述的程序，使用符合这些要求的设备，给出 结果基本相同。非线性助听器信号处理特性的测量 处理技术仅对所使用的测试信号有效。需要不同测量方法的测量 测试信号或测试条件不在本标准范围内。只有在以下情况下，才能证明符合本标准中的规范: 测量，由测试实验室实际扩展的测量不确定度扩展， 完全在本标准规定的公差范围内，如6中给出的值所示。 1. 考虑助听器与个人的声学耦合的测量方法 耳朵和最终用户的个体解剖变异对声学性能的影响 助听器的性能，即真正的耳朵测量，不在本标准的范围之内 特殊标准。

ScopeThis American National Standard specifies a test signal designed to represent normal speech, the International Speech Test Signal (ISTS), together with the procedures and the requirements for measuring the characteristics of signal processing in air-conduction hearing aids. The measurements are used to derive the estimated insertion gain (EIG). For the purposes of characterizing a hearing aid for production, supply and delivery, the procedures and requirements to derive the coupler gain on a 2 cm3 coupler as defined in IEC 60318-5 are also specified.The procedure uses a speech-like test signal and the hearing aid settings are set to those programmed for an individual end-user or those recommended by the manufacturer for a typical enduser for a range of flat, moderately sloping or steep sloping audiograms, so that the measured characteristics are comparable to those which may be obtained by a wearer at typical user settings. The purpose of this standard is to ensure that the same measurements made on a hearing aid following the procedures described, and using equipment complying with these requirements, give substantially the same results.Measurements of the characteristics of signal processing in hearing aids which apply non-linear processing techniques are valid only for the test signal used. Measurements which require a different test signal or test conditions are outside the scope of this standard.Conformance to the specifications in this 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 standard as given by the values given in 6.1. Measurement methods that take into account the acoustic coupling of a hearing aid to the individual ear and the acoustic influence of the individual anatomical variations of an end-user on the acoustical performance of the hearing aid, known as real-ear measurements, are outside the scope of this particular standard.