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A Proposed Loudness-Efficiency Rating for Loud-Speakers and the Determination of System Power Requirements for Enclosures

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2 Author(s)
Hopkins, H.F. ; Bell Telephone Laboratories, Inc., Murray Hill Laboratory, Murray Hill, N.J. ; Stryker, N.R.

Experimental and computed data relating to the loudness contribution of various ranges of the frequency spectra of speech and music are correlated with the corresponding energy distribution. A relatively simple measurement of sound pressure and a knowledge of certain acoustic radiation phenomena are applied to this correlation to form the basis of a method for predicting the loudness established by loudspeakers in enclosures. A loudness-efficiency rating for loudspeakers is suggested, and its application to sound-system engineering problems is described.

Published in:

Proceedings of the IRE  (Volume:36 ,  Issue: 3 )