1.1 本试验方法涵盖了建筑隔墙（如各种墙体、可操作隔墙、地板-天花板组件、门、窗、屋顶、面板和其他分隔空间的建筑构件）的空气传播声损失的测量。它也可能应用于建筑行业以外的部门，尽管这些部门超出了范围。 1.2 本标准报告的主要数量是强度传输损耗（ITL），不得使用其他名称。同样，从测得的ITL中得出的单数额定强度声传输等级（ISTC）不得使用任何其他名称。 1.3 本试验方法可用于揭示隔板或其部分的声辐射特性。 1.4 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.5 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。 注1: 本ASTM标准规定的测量受试建筑构件辐射声强的方法符合或超过ISO 15186-1。如果还需要符合ISO 15186-1，则必须特别考虑源室和样品安装的要求，因为它们与本标准的要求不同。 1.6 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====== 5.1 本试验方法可用于在源室和试样安装条件满足试验方法要求的实验室环境中估算建筑构件的传输损耗 E90 . 接收室的可接受性将由一组现场指标确定，这些指标定义了强度估计的质量和准确性。 5.2 通过适当构造测量强度的表面，可以有选择地排除声能路径的影响，包括接头、间隙以及侧面声路径的影响。当无法在试验方法中对隔板进行准确测量时，该方法可能特别有用 E90 设施，因为隔声受到涉及设施源和接收室表面的侧面传输的限制（例如，从源室地板到接收室地板的路径，通过隔离器和支撑两者的板）。 附件A3 详细讨论了这一点。 5.3 离散点法允许映射辐射声强，可用于识别缺陷或独特特征 ( 2. ) 分区的。 5.4 文献中报告的当前研究表明，使用强度技术获得的传输损耗测量值与使用传统两室混响技术（例如，测试方法）获得的传输损耗测量值之间存在偏差 E90 , ( 3. ) 和 ( 4. ) ). 附录E提供了可能预期的偏差估计。尽管存在偏差，但不得对通过本试验方法获得的测量数据进行校正。

1.1 This test method covers the measurement of airborne sound transmission loss of building partitions such as walls of all kinds, operable partitions, floor-ceiling assemblies, doors, windows, roofs, panels and other space-dividing building elements. It may also be have applications in sectors other than the building industry, although these are beyond the scope. 1.2 The primary quantity reported by this standard is Intensity Transmission Loss (ITL) and shall not be given another name. Similarly, the single-number rating Intensity Sound Transmission Class (ISTC) derived from the measured ITL shall not be given any other name. 1.3 This test method may be used to reveal the sound radiation characteristics of a partition or portion thereof. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. Note 1: The method for measuring the sound intensity radiated by the building element under test defined by this ASTM standard meets or exceeds those of ISO 15186-1. Special consideration will have to be given to requirements for the source room and specimen mounting if compliance with ISO 15186-1 is also desired as they differ from those of this standard. 1.6 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 This test method can be used to obtain an estimate the transmission loss of building elements in a laboratory setting where the source room and the specimen mounting conditions satisfy the requirements of Test Method E90 . The acceptability of the receiving room will be determined by a set of field indicators that define the quality and accuracy of the intensity estimate. 5.2 By appropriately constructing the surface over which the intensity is measured it is possible to selectively exclude the influence of sound energy paths including the effects from joints, gaps as well as flanking sound paths. This method may be particularly useful when accurate measurements of a partition can not be made in an Test Method E90 facility because the partition sound insulation is limited by flanking transmission involving facility source and receiver room surfaces, (for example, the path from the source room floor to the receiver room floor via the isolators and the slab supporting the two). Annex A3 discusses this in detail. 5.3 The discrete point method allows the mapping of the radiated sound intensity which can be used to identify defects or unique features ( 2 ) of the partition. 5.4 Current research reported in the literature indicate that there exists a bias between measures of transmission loss obtained using the intensity technique and those obtained using the conventional two room reverberation technique (for example, Test Method E90 , ( 3 ) and ( 4 ) ). Appendix E provides estimates of the bias that might be expected. Despite the presence of a bias, no corrections are to be applied to the measured data obtained by this test method.