1978-04-11
1980-05-20
Olms, Douglas W.
179 1GQ, H04R 504
Patent
active
042040922
ABSTRACT:
A high fidelity playback system is described using a plurality of speakers in conjunction with a conventional stereo system and an auditory interface unit which provides improved high fidelity playback. The system includes for example, two front high fidelity speakers in the normal stereophonic position, and a second pair of high fidelity speakers placed on an axis defined by the ears of the listener. The amplifier feeds the front speakers directly. The interface unit attenuates the left and right channel signals according to the inter-channel signal level differential, and distributes them in proper proportion to the second pair of speakers to create full stereophonic realism with enhanced depth perception and positioning of the original sound sources.
Alternatively, only two speakers are used. The interface unit attenuates the left and right channel signals as before, selectively modifies portions of the signal on a frequency dependent basis, and delivers the resultant modified left and right channel information to the respective speakers.
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"A Variable Stereo Suppression Control" by D'Errico in Audio, Aug. 1958, p. 23.
Garvey, Jr. Charles C.
Keaty Thomas S.
Olms Douglas W.
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