1.1 本规范描述了使用试验方法对实验室声音传输损耗测量进行质量控制的标准参考样本的构造和安装 E90 . 1.2 实验室可选择构建和测试此处所述的所有参考样本，或仅构建和测试其中的一个子集。测试方法或认证机构可能需要特定样本。 1.3 以国际单位制表示的数值应视为标准值。括号中给出的值仅供参考。 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。

1.1 This specification describes the construction and installation of standard reference specimens for quality control of laboratory sound transmission loss measurements using Test Method E90 . 1.2 Laboratories may choose to construct and test all of the reference specimens described here or only a subset. Specific specimens may be required by a test method or an accrediting agency. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 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.