Simulated stereo from a monaural source sound reproduction system
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United States of America Patent
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Dec 29, 1981
Grant Date -
N/A
app pub date -
Apr 14, 1980
filing date -
Apr 14, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A source of monaural sound such as a radio receiver or record player provides an audio signal which is fed along parallel paths to a like number of speakers. In one or more paths there is a control which imparts amplification or gain to the signal. In the other path, however, a frequency dependent amplitude variation and phase delay means is interposed in the circuit. It is the purpose of this means to vary the amplitude response of that signal to introduce a bass boost of about a factor of two and a treble cut of about a factor of ten and to vary the phase shift of that signal to introduce from about a 180.degree. to about 225.degree. phase lag to the monaural signal, the amplitude response and phase lag being a function of the frequency of the signal, to impart a simulated stereo effect to the sound as heard from the plurality of speakers.
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