本标准描述了用宽带噪声信号表征助听器稳态性能的技术。之所以需要这样一个标准，是因为评估助听器在更接近真实使用环境中的性能非常重要。本文规定的噪声测试信号已被国家标准局用于测试助听器超过20年。所述测试包括噪声饱和声压级、噪声增益、频率响应、频率响应曲线族和输出与输入特性。此外，附录建议使用相干函数来指示频率响应测量的有效性，并区分使用随机和伪随机噪声以及异步与同步分析。

This standard describes techniques for characterizing the steady-state performance of hearing aids with a broad-band noise signal. The need for such a standard arises from the importance of assessing the performance of hearing aids in environments more nearly representing their real-world use. The noise test signal specified herein has been employed by the National Bureau of Standards for over 20 years in testing hearing aids. Among the tests described are noise saturation sound pressure level, noise gain, frequency response, family of frequency response curves and output versus input characteristic. Additionally, the appendix recommends use of the coherence function to indicate the validity of frequency response measures and distinguishes between use of random and pseudo-random noise and asynchronous versus synchronous analysis.