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ASTM C423-07

Historical Revision

Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method

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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.


SDO ASTM: ASTM International
Document Number C423
Publication Date Jan. 1, 2007
Language en - English
Page Count 11
Revision Level 07
Supercedes
Committee E33.01
Publish Date Document Id Type View
April 15, 2023 C0423-23E01 Revision
April 15, 2023 C0423-23 Revision
Feb. 1, 2022 C0423-22 Revision
Jan. 15, 2017 C0423-17 Revision
Oct. 15, 2009 C0423-09A Revision
Oct. 1, 2009 C0423-09 Revision
Oct. 1, 2008 C0423-08A Revision
March 1, 2008 C0423-08 Revision
June 1, 2007 C0423-07A Revision
Jan. 1, 2007 C0423-07 Revision
Dec. 1, 2006 C0423-06 Revision
Dec. 10, 2002 C0423-02AE01 Revision
Dec. 10, 2002 C0423-02A Revision
April 10, 2002 C0423-02 Revision
July 10, 2001 C0423-99A Revision
July 10, 2001 C0423-01 Revision
July 10, 2001 C0423-00 Revision