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ASTM C384-98

Historical Revision

Standard Test Method for Impedance and Absorption of Acoustical Materials by Impedance Tube Method

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1.1 This test method covers the use of an impedance tube, alternatively called a standing wave apparatus, for the measurement of impedance ratios and the normal incidence sound absorption coefficients of acoustical materials.

1.2 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.

1.3 The values stated in SI units are to be regarded as the standard.


SDO ASTM: ASTM International
Document Number C384
Publication Date July 10, 1998
Language en - English
Page Count 9
Revision Level 98
Supercedes
Committee E33.01
Publish Date Document Id Type View
April 1, 2004 C0384-04 Revision
Sept. 10, 2003 C0384-03 Revision
July 10, 1998 C0384-98 Revision
Oct. 1, 2022 C0384-04R22 Reaffirmation
April 1, 2016 C0384-04R16 Reaffirmation
Nov. 1, 2011 C0384-04R11 Reaffirmation