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US 3,992,584 AGranted
Automatic microphone mixer
OwnerDaniel W. Duganinventor
Life of this patent
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OwnerDaniel W. Duganinventor
Estimating the term…
In a sound reinforcement system having a plurality of input channels and input signal sources and at least one output channel, a gain control apparatus is provided for controlling the gain applied to the signals in each channel whereby the total gain of the system remains constant. Gain changes in each channel are proportional to signal ratios such that the automatic gain variations in all channels are always complementary. In a preferred embodiment, the control apparatus comprises means for providing a reference signal having a magnitude proportional to the sum of the amplitudes of the signals in the channels and a plurality of control signals each of which has a magnitude proportional to the amplitude of the signal in a respective one of said channels, and a plurality of attenuating means, each of which is responsive to the ratio of the corresponding one of said control signals to the reference signal.
In a signal control system including a plurality of input signal channels for receiving a plurality of input signals, comprising a plurality of controllling means each receiving one of said input signals and each comprising means for multiplying said one input signal by the quotient of the average amplitude of said input signal divided by the average amplitude of the sum of all the input signals of all of said input channels and transmitting means for transmitting the output of each of said controlling means.
A signal control system comprising a plurality of input signal channels each receiving an input signal;
Dependencies are inferred from the claim text.