1.1本试验方法 旨在提供与部分高度空间分隔器一起使用时天花板系统的声音反射特性测量。这种安排通常用于办公室和学校，以在没有全高隔板的情况下实现工作区之间的语音隐私。本试验方法适用于任何天花板配置，例如，包括其他吸声天花板中的反光板图案。按照规定，本试验方法主要限于固定分隔器高度为1.50 m（60 in.）的测量，名义上为2的天花板高度。 70米（108英寸），震源高度为1.20米（48英寸），麦克风位置为1.20米（48英寸）身高 1.2 实验室认证 -附录A1中给出了用于本试验方法的实验室认证程序。 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和健康实践，并确定监管限制的适用性。 1.4以可接受的公制单位表示的值应视为标准。括号中给出的值仅供参考。

1.1 This test method is intended to provide measurements of the sound reflective characteristics of ceiling systems when used in conjunction with partial-height space dividers. This arrangement is commonly used in offices and schools to achieve speech privacy between work zones in the absence of full-height partitions. This test method is applicable to any ceiling configuration, including, for example, a pattern of sound-reflective panels in an otherwise sound-absorptive ceiling. This test method, as specified, is primarily restricted to measurements with a fixed space divider height of 1.50 m (60 in.), a ceiling height of nominally 2.70 m (108 in.), a source height of 1.20 m (48 in.), and microphone positions at 1.20 m (48 in.) height. 1.2 Laboratory Accreditation —A procedure for accrediting a laboratory for purposes of this test method is given in Annex A1. 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 and health practices and determine the applicability of regulatory limitations prior to use. 1.4 The values stated in acceptable metric units are to be regarded as the standard. The values given in parentheses are provided for information only.