Patent ID: 11863930
Assignee: SILENTIUM LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 21:
22. An acoustic control system comprising:
one or more acoustic transducers;
one or more acoustic sensors to generate one or more acoustic sensor signals representing sound at one or more sensing locations; and
a controller configured to determine a sound control pattern to control sound within a sound control zone and to output the sound control pattern to the one or more acoustic transducers, the controller configured to determine the sound control pattern based on the one or more acoustic sensor signals, wherein the controller comprises an Acoustic Feedback (AFB) mitigator configured to mitigate AFB between at least one acoustic transducer of the one or more acoustic transducers and at least one acoustic sensor of the one or more acoustic sensors, the AFB mitigator comprising:
a first filter configured to generate a first filtered signal by filtering a first input signal, the first input signal based on a transducer acoustic pattern to be output by the acoustic transducer; and
a second filter configured to generate a second filtered signal by filtering the first input signal, wherein the second filter comprises an adaptive filter, which is adapted based on a difference between an AFB-mitigated signal and the second filtered signal, wherein the AFB-mitigated signal is based on a difference between a second input signal and the first filtered signal, wherein the second input signal is based on a sensor acoustic pattern sensed by the acoustic sensor.