Electrical audio signal processing systems and devices – Binaural and stereophonic – Hearing aid
Patent
1987-05-27
1988-07-19
Isen, Forester W.
Electrical audio signal processing systems and devices
Binaural and stereophonic
Hearing aid
H04R 502
Patent
active
047590661
ABSTRACT:
A loudspeaker system for reproducing stereophonic sound having an expanded acoustic image has left and right main speakers and left and right dimensional speakers. The main speakers are fed the right and left channel signals R and L and the dimensional speakers are fed the difference signals R - L and L - R. Interspeaker cabling includes one or more transformers used to develop and couple the difference signals to the dimensional speakers, which serve as isolation means and also suppress the -R and -L components of the difference signals for low frequencies. The loudspeaker system is particularly suited for automobile installations where the main speakers are in front and the dimensional speakers in the rear of the automobile interior, or vice versa.
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patent: 4569074 (1986-02-01), Polk
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Campbell Colin B.
Polk Matthew S.
Isen Forester W.
Polk Investment Corporation
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