1.1 这些规程描述了在按照试验方法进行的声传输损失试验期间，用于海军和海上船舶应用的试样安装 E90型 . 1.2 这些规范中规定的结构旨在安装由各种材料和配置组成的单层处理或复合处理。声学处理材料可以是吸声材料、软质隔板和绝缘材料的组合。 1.3 以国际单位制表示的数值应视为标准。括号中的值仅供参考。 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建立适当的安全、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（TBT）委员会发布的《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 3.1 覆盖平面的材料提供的声音传输损失不仅取决于材料的物理财产，还取决于其安装的结构类型和使用的安装方法。 3.2 海军和海事建筑师和设计工程师要求声学处理材料具有特定的传输损耗特性，因为它们将安装在船舶结构上。这些实践中规定的安装结构和程序旨在模拟这种船上环境。 3.3 测试报告可参考实践中的安装 第123页 而不是提供所使用的安装的详细描述。

1.1 These practices describe test specimen mountings to be used for naval and marine ship applications during sound transmission loss tests performed in accordance with Test Method E90 . 1.2 The structure specified in these practices is intended for mounting of single-layer treatments or composite treatments consisting of various materials and configurations. Acoustical treatment materials may be combinations of acoustical absorbent materials, limp mass septums, and insulation materials. 1.3 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only. 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 ====== 3.1 The sound transmission loss provided by a material that covers a flat surface depends not only on the physical properties of the material but also on the type of structure to which it is mounted and the mounting method used. 3.2 Naval and marine architects and design engineers require specific transmission loss characteristics of acoustical treatment materials as they would exhibit installed on a ship's structure. The mounting structure and procedures specified in these practices are intended to simulate such a shipboard environment. 3.3 Test reports may refer to this mounting by Practices E1123 instead of providing a detailed description of the mounting used.