H - Electricity – 04 – S
Patent
H - Electricity
04
S
181/2, 179/9
H04S 3/02 (2006.01) H04R 5/02 (2006.01) H04R 5/04 (2006.01)
Patent
CA 1198683
33 METHOD AND APPARATUS FOR REPRODUCING SOUND HAVING A REALISTIC AMBIENT FIELD AND ACOUSTIC IMAGE ABSTRACT OF THE DISCLOSURE Apparatus for reproducing sound having a realistic ambient field and acoustic image is used in a stereophonic sound reproduction system having a left channel output and a right channel output. A right main speaker and a left main speaker are disposed at right and left main speaker locations, respectively, which are equidistantly spaced from a listening location along a listening axis perpendicular to a line joining the left and right main speakers. A right sub-speaker and a left sub-speaker are respectively disposed at right and left sub-speaker locations equidistantly spaced from the listening location, and further from the listening location than the main speaker. The left and right channel outputs are respectively coupled to the left and right main speakers. A left channel minus right channel difference signal is coupled to the left sub-speaker and a right channel minus left channel difference signal is coupled to the right sub-speaker. In one embodi- ment, the main and sub-speakers for each channel are respectively incorporated in a common enclosure to fix the spacing therebetween. A technique for determining optimal spacing between the main and sub-speakers and between the various speakers and the listening location is set forth.
430384
Goudreau Gage Dubuc
Polk Audio Inc.
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