1.1本试验方法包括通过测量衰减率来测量混响室中的吸声。描述了测量房间吸收、物体（如办公屏幕）吸收和吸声材料（如吸声天花板）样本吸声系数的程序。 1.2现场测量-虽然本试验方法主要包括实验室测量，但4.1中所述的试验方法可用于对房间的吸收进行现场测量（另见5.5）。附录X2中描述了测量现场房间吸收的非标准方法。 1.3本试验方法包括实验室认证信息（见附件A1）、不对称屏幕信息（见附件A2）和混响室资格信息（见附件A3）。 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。

1.1 This test method covers the measurement of sound absorption in a reverberation room by measuring decay rate. Procedures for measuring the absorption of a room, the absorption of an object, such as an office screen, and the sound absorption coefficients of a specimen of sound absorptive material, such as acoustical ceiling tile, are described. 1.2 Field Measurements - Although this test method primarily covers laboratory measurements, the test method described in 4.1 can be used for making field measurements of the absorption of rooms (see also 5.5). A non-standard method to measure the absorption of rooms in the field is described in Appendix X2. 1.3 This test method includes information on laboratory accreditation (see Annex A1), asymmetrical screens (see Annex A2), and reverberation room qualification (see Annex A3). 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.