ASTM C522

Standard Test Method for Airflow Resistance of Acoustical Materials

Applicable Apparatus:  The Frazier Differential Pressure Air Permeability Tester & Universal Sample Holder

email info@frazierinstrument.com for excel spreadsheet that explains ASTM C522 used with Frazier Air Permeability Tester

ASTM
C
522
2003
Standard Test Method for Airflow Resistance of Acoustical Materials
1. Scope

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 10 000 mks rayls (Pas/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 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.

2. Referenced Documents

C384 Test Method for Impedance and Absorption of Acoustical Materials by the Impedance Tube Method
C634 Terminology Relating to Environmental Acoustics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of Test Methods

Index Terms

absorption; acoustical materials; airflow resistance; airflow resistivity; 91.120.20; sound insulation

 

ASTM Ordering Information or Contact Frazier for a free copy

Applicable Apparatus:  The Frazier Differential Pressure Air Permeability Tester & Universal Sample Holder

email info@frazierinstrument.com for excel spreadsheet that explains ASTM C522 used with Frazier Air Permeability Tester