equal loudness contour
equal loudness contour[¦ē·kwəl ′lau̇d·nəs ‚kän‚tu̇r]
A curve on a graph of sound intensity in decibels versus frequency at each point along which sound appears to be equally loud to a listener. Also known as Fletcher-Munson contour.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.