Propagation Constant and Specific Impedance of Airborne Sound in Metal Wool

Abstract

This is a study of the acoustic properties of various grades (0000, 00, 1, and 3) and densities (0.0046–0.22 g/cm2) of steel wool. A theory that accounts for momentum and heat transfer from the acoustic wave to the wool is presented. Experimental evidence, obtained at frequencies of 173, 480, and 1440 Hz, confirms the theory to the expected accuracy.

Sound absorbing characteristics of fibrous metal materials at high temperatures

“…Many authors [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] have studied the damping of acoustic waves by viscosity effect. Delany and Bazley [1] presented simple power-law relations obtained by best fitting a large amount of experimental data.…”