1.1 本规程涵盖了使用扫频信号的脉冲响应测量方法，以及它用于确定两个重要的房间声学量:两个位置之间的声压级差，例如用于确定传输损耗的标准；以及在确定衰减率或混响时间的标准中使用的衰减曲线。 1.2 本规程应与使用中所述一个或两个数量的试验方法结合使用 1.1 。 1.3 单位-- 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 涉及声音衰减的ASTM标准测试方法和涉及吸收率或衰减率的测试方法使用噪声信号来确定这些量。使用本标准实践中给出的扫描信号的IR方法可以被这些其他标准所参考，以提供替代的测量技术。这种替代技术的优点是在更短的时间内提供更可靠的结果。 5.2 在重复性条件下，用噪声和IR方法获得的结果被认为与噪声方法的典型测量不确定度内的结果相同。 本规程中给出了强制性验证程序，以确保在根据本标准要求开发软件或硬件时正确实施IR方法。 5.3 为了避免IR方法实施过程中的歧义，并确保不同用户的结果一致，本规程规定了信号生成和后处理中使用的方法和参数的值。这与描述这种方法的类似标准形成了对比，如ISO 18233，后者提供的指导较少。

1.1 This practice covers the impulse response measurement method using sweep signals, and its use to determine two important room-acoustical quantities: the difference in sound pressure levels between two positions, as used for example in standards determining transmission loss; and decay curves, as used in standards determining the decay rate or reverberation time. 1.2 The practice shall be used in conjunction with test methods that use one or both of the quantities described in 1.1 . 1.3 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 ASTM standard test methods that involve sound attenuation and those test methods that involve absorption or decay rates use a noise signal to determine these quantities. The IR method using a sweep signal given in this standard practice can be referenced by these other standards to provide an alternative measurement technique. This alternative technique has the advantage of providing more reliable results in a shorter period of time. 5.2 The results obtained with the noise and IR method are considered identical to within the typical measurement uncertainty for the noise method under repeatability conditions. A mandatory validation procedure is given in this practice to ensure a correct implementation of the IR method when developing software or hardware according to the requirements in this standard. 5.3 To avoid ambiguity in the implementation of the IR method and to ensure consistent results across different users, this practice prescribes the values of methods and parameters to be used in the signal generation and post-processing. This is in contrast to similar standards describing this method, such as ISO 18233, which provide less guidance.