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ASTM C384-04(2016)
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ASTM C384-04(2016) Standard Test Method for Impedance and Absorption of Acoustical Materials by Impedance Tube Method
standard by ASTM International, 04/01/2016
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Full Description
1.1This 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.
1.2The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3This 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.