Acoustic material

Impedance and Absorption of Acoustical Materials ASTM E1050

Scope: ASTM E1050 test method can be applied to measure sound absorption coefficients of absorptive materials at normal incidence, that is, 0°. It can also be used to determine specific impedance and admittance ratios. This test method allows one to compare relative values of sound absorption when it is impractical to procure large samples for...

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