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ASTM C522-87(1997)

Historical Reaffirmation

Standard Test Method for Airflow Resistance of Acoustical Materials

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1.1 This test method covers the measurement of airflow resistance and the related measurements of specific airflow resistance and airflow resistivity of porous materials that can be used for the absorption and attenuation of sound. Materials cover a range from thick boards or blankets to thin mats, fabrics, papers, and screens. When the material is anisotropic, provision is made for measurements along different axes of the specimen.

1.2 This test method is designed for the measurement of values of specific airflow resistance ranging from 100 to 10000 mks rayls (Pa[dot]s/m) with linear airflow velocities ranging from 0.5 to 50 mm/s and pressure differences across the specimen ranging from 0.1 to 250 Pa. The upper limit of this range of linear airflow velocities is a point at which the airflow through most porous materials is in partial or complete transition from laminar to turbulent flow.

1.3 A procedure for accrediting a laboratory for the purposes of this test method is given in Annex A1.

1.4 This standard does not purport to address all of the safety problems, 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 C522
Publication Date Jan. 1, 1993
Language en - English
Page Count 5
Revision Level 87(1997)
Supercedes
Committee E33.01
Publish Date Document Id Type View
Oct. 1, 2009 C0522-03R09E01 Revision
Oct. 1, 2003 C0522-03 Revision
Oct. 1, 2022 C0522-03R22 Reaffirmation
April 1, 2016 C0522-03R16 Reaffirmation
Oct. 1, 2009 C0522-03R09 Reaffirmation
Jan. 1, 1993 C0522-87R97 Reaffirmation