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(en )
1988-04-19
Automatic dynamic equalizing
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(en )
1994-11-01
Dynamic equalizing of powered loudspeaker systems
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(en )
1979-12-18
Amplifying and equalizing
US4381488A
(en )
1983-04-26
Dynamic volume expander varying as a function of ambient noise level
WO1987006090A1
(en )
1987-10-08
Stereo enhancement system
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(en )
1966-01-11
Sound signal transforming system
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(en )
1966-10-25
Dynamic equalizer circuits having a light dependent cell for producing a relatively constant apparent loudness effect
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(en )
1983-01-25
Gain control circuit for noise reduction system
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(en )
1966-12-20
Sound signal correction system
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1984-09-11
Circuit for noise reduction particularly useful with signal recording/reproducing apparatus
Scott
1953
The amplifier and its place in the high-fidelity system
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(en )
1982-06-29
Compander circuit which produces variable pre-emphasis and de-emphasis
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(en )
1976-07-27
Compressors, expanders and noise reduction systems
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1975-10-07
Signal transmission system
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(en )
1944-02-08
Compressor and variable equalizer system
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1966-04-19
Audio amplifier including volume compression means
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1967-04-11
Combined tone control and volume expander arrangement
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1981-06-02
Electronic gain and noise control for recording of analog information
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(enrdf_load_stackoverflow )
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1969-04-01
Gain control device for high fidelity audio systems
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1970-12-15
Noise reduction circuit and system
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1966-10-25
Automatic gain control device for high fidelity audio systems
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1983-12-06
Noise reduction circuit
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1975-10-07
Audio frequency amplitude compensator
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1982-08-25
Audio signal amplifier circuit