ASTM International - ASTM E1050-98
Standard Test Method for Impedance and Absorption of Acoustical Materials Using a Tube, Two Microphones, and a Digital Frequency Analysis System
Organization: | ASTM International |
Publication Date: | 10 June 1998 |
Status: | inactive |
Page Count: | 11 |
ICS Code (Acoustics in building. Sound insulation): | 91.120.20 |
scope:
1.1 This test method covers the use of an impedance tube and the use of a two-microphone method and a digital frequency analysis system for the measurement of normal incidence sound absorption coefficients and normal specific acoustic impedance ratios of materials.
1.2 This standard does not purport to address the safety problems associated with its use. It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.