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A unit of specific acoustical impedance, equal to a sound pressure of 1 dyne per square centimeter divided by a sound particle velocity of 1 centimeter per second. Also known as specific acoustical ohm (Ωs ); unit-area acoustical ohm.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a rarely used unit of specific acoustic impedance in the cgs system of units (see ACOUSTIC IMPEDANCE). It was named in honor of the British physicist Lord Rayleigh. The rayl is the magnitude of a medium’s specific acoustic impedance for which a sound pressure of 1 dyne/cm2 produces a linear velocity of 1 cm/sec in the particles of the medium; 1 rayl = 1 dyne-sec/cm3 = 10 newton-sec/m3.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.