[sahy-koh-uh-koo-stiks or, esp. British, -uh-kou-]
noun (used with a singular verb)
the study of sound perception.

1945–50; psycho- + acoustics

psychoacoustic, psychoacoustical, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
psychoacoustics (ˌsaɪkəʊəˈkuːstɪks)
(functioning as singular) psychol the study of the relationship between sounds and their physiological and psychological effects

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

psychoacoustics psy·cho·a·cous·tics (sī'kō-ə-kōō'stĭks)
The scientific study of the perception of sound.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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