1.1 本试验方法规定了根据A加权和三分之一倍频程声压级测量掩蔽声的程序。 1.2 该测试方法的结果可用于确定掩蔽声是否满足（或不满足）特定规范，以及在何处满足（或不满足）特定规范。 1.3 本试验方法不评估整体声学环境。它仅用于测量和报告掩蔽声级。 1.4 以国际单位制表示的数值应视为标准值。括号中的值仅供参考。 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。 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 声学性能取决于许多因素（见指南 E1374 讨论一般办公室声学考虑）。 其中一个因素是掩蔽声。整个处理区域的掩蔽光谱形状和水平必须符合规定的公差。本试验方法对这些参数的测量和记录进行了说明。 5.2 该测试方法的结果用于确定掩蔽声是否符合特定规范。

1.1 This test method specifies the procedure used to measure the masking sound in terms of A-weighted and one-third-octave-band sound pressure levels. 1.2 The results of this test method can be used to determine if and where the masking sound meets (or does not meet) a particular specification. 1.3 This test method does not evaluate the overall acoustical environment. It is intended only to measure and report the masking sound levels. 1.4 The values stated in SI units are to be regarded as standard. The values in parentheses are for information only. 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. 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 Acoustical performance is dependent on many factors (see Guide E1374 for a discussion on general office acoustical considerations). One of these factors is the masking sound. The masking spectrum shape and level must conform within specified tolerances throughout the treated area. The measurement and recording of these parameters are addressed in this test method. 5.2 The results from this test method are used to determine if the masking sound meets a particular specification.