Noise suppression system

Details Noise suppression system Noise suppression system

H - Electricity

04

B

340/72

H04B 15/00 (2006.01) H03G 3/32 (2006.01) H03G 5/18 (2006.01)

Patent

CA 2025696

ABSTRACT OF THE DISCLOSURE The noise suppression system has a discriminator, an amplitude circuit and a filtering circuit. The discriminator has an input sensor, a timer and a decision unit. The input sensor senses when the incoming signal is over a given amplitude threshold and starts the timer running. The decision unit determines when the time is over a given time threshold and the discriminator informs the amplitude circuit. The amplitude circuit has an amplitude sensor and a control unit. The amplitude sensor senses the amplitude of the incoming signal when the discriminator has a signal over the given time threshold and the amplitude sensor relays the amplitude to the control unit. The control unit outputs a control signal. The control unit has two amplitude thresholds, the control signal being at a constant minimum below the first threshold, proportional to the amplitude sensor amplitude between the thresholds, and at a constant maximum above the second threshold. The control signal is sent to the filtering circuit which has a filter and an intensity equalizer. The filter is a high pass filter whole cut-off frequency is controlled by the control signal and the intensity equalizer boosts the filtered signal according to the amplitude of the control signal.

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