Active attenuation system with increased dynamic range

Details Active attenuation system with increased dynamic range Active attenuation system with increased dynamic range

H - Electricity

04

R

354/1, 179/5

H04R 3/02 (2006.01) G10K 11/04 (2006.01) G10K 11/16 (2006.01) G10K 11/178 (2006.01)

Patent

CA 1278751

Abstract An active acoustic attenuation system is provided that increases dynamic range by adjusting the amplitude of the input signal and the error signal at respective model and error inputs and providing automatic self-calibration. Input and error transducers provide analog input and error signals which are converted by an analog to digital converter to digital input and error signals for input to the model . Digital to analog converters have digital inputs from respective digital input and error signals and operate in an analog to analog mode with analog inputs from respective input and error transducers and analog outputs to the analog to digital converter . Dynamic range is also increased by adjusting the amplitude of the correction signal to the output transducer

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