1.1 该分类提供了基于测试方法中所述的标准攻丝机产生的三分之一倍频带冲击声压级计算高频冲击声传输的单数额定值的方法 E492 , E1007年 和 E2179年 . 1.2 该分类定义了其他标准中未定义的评级。在其权限范围内，其他标准应根据该分类方法定义额外评级。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户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。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 该分类提供了一系列用于描述高频冲击隔声的单数额定值。本文中的“高频”是指从400到3150 Hz的第三倍频程频带，这大约是建筑声学测量中感兴趣的频率范围的上半部分。高频冲击声的常见来源包括高跟鞋、拖拽家具、狗脚趾甲和物体掉落在硬面地板上的冲击声。 4.2 总成的高频冲击隔声主要由地板面层的特性决定，在很大程度上与总成的其他细节无关。 3. 对于许多组件，现有额定值（如IIC）由400 Hz以下的频带控制。 对于这些组件，现有额定值不能代表高频冲击绝缘。此处定义的高频额定值已被证明能够准确地表示组件在高频下的行为。 4. , 5. 这些额定值旨在帮助声学专业人员评估组件的高频绝缘，以及评估、排序和指定将影响高频冲击声水平的地板装饰产品。 4.3 该分类中的评分与现有分类评分具有相似的数值范围和行为 E989 . 此外，该分类中的评级可以根据现有测试报告计算，无需额外测试。这样做是为了利用现有的测试结果和知识体系。 4.4 该分类仅描述冲击声的高频范围，而不描述冲击噪声的其他方面。它不涉及400 Hz以下的冲击声，例如脚步声，并且需要额外的额定值来描述这些频率范围内的冲击声。此分类不能取代分类 E989 （冲击绝缘等级），不可互换。例如，组件的HIIC额定值并不确定其IIC额定值，并且不能用于表明符合IIC要求。预计高频评级将与现有评级一起报告。 4.5 所述额定值系列使用相同的计算方法，仅在计算中使用的第三个倍频程数据的来源方面有所不同。每个现有影响评级都有一个高频版本，其中使用该分类而不是分类 E989 计算单数额定值。

1.1 This classification provides methods for calculating single-number ratings of high-frequency impact sound transmission, based on one-third-octave-band impact sound pressure levels generated by the standard tapping machine as described in Test Methods E492 , E1007 , and E2179 . 1.2 This classification defines ratings that are not defined in other standards. Within their purview, other standards shall define additional ratings based on the methods of this classification. 1.3 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. 1.4 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 ====== 4.1 This classification provides a family of single-number ratings for describing high-frequency impact sound insulation. “High-frequency” in this context refers to the third-octave bands from 400 to 3150 Hz, which is approximately the upper half of the frequency range of interest in building acoustics measurements. Common sources of high-frequency impact sound include the impact of hard-heeled shoes, dragging furniture, dog toenails, and dropping objects on hard-surfaced flooring. 4.2 The high-frequency impact sound insulation of an assembly is primarily determined by the characteristics of the floor topping, largely independent of the other details of the assembly. 3 For many assemblies, the existing ratings (such as IIC) become controlled by frequency bands below 400 Hz. For these assemblies, the existing ratings are not representative of the impact insulation at high frequencies. The high-frequency ratings defined here have been shown to accurately represent the behavior of assemblies at high frequencies. 4 , 5 These ratings are intended to aid the acoustical professional in evaluating the high-frequency insulation of an assembly, and in evaluating, rank-ordering, and specifying floor topping products that will affect the level of high-frequency impact sound. 4.3 The ratings in this classification have similar numerical range and behavior as the existing ratings of Classification E989 . Further, the ratings in this classification can be calculated from existing test reports without additional testing. This was done to take advantage of the existing test results and body of knowledge. 4.4 This classification describes only the high-frequency range of impact sound and no other aspects of impact noise. It does not address impact sound below 400 Hz, such as thudding from footfalls, and additional ratings are required to describe impact sound in these frequency ranges. This classification does not replace Classification E989 (Impact Insulation Class) and is not interchangeable with it. For example, the HIIC rating of an assembly does not determine its IIC rating and cannot be used to show compliance with an IIC requirement. The expectation is that the high-frequency ratings would be reported alongside the existing ratings. 4.5 The family of ratings described use the same calculation method and differ only in the origin of the third-octave data used in the calculation. There is a high-frequency version of each existing impact rating, in which this classification is used instead of Classification E989 to calculate the single-number rating.