Abstract: An active noise control (ANC) system uses a proportional integral (PI) controller to produce a control signal based on feedback that comprises a combination of ambient sound and antinoise. The ANC system generates a corrected control signal based on the control signal and a configurable filtering parameter, and produces the antinoise under control of the corrected control signal such that the antinoise destructively interferes with frequencies of the ambient sound to produce the feedback. The ANC system uses a microphone to receive the feedback and provide the feedback to the PI controller.

Abstract: Active noise control (ANC) is performed within a vehicle. Suppressed sound is produced by suppressing frequencies of ambient sound above a threshold frequency that enter an interior cavity of a sound-suppressing enclosure disposed within, and spaced from, interior walls of the vehicle. A microphone disposed within the interior cavity of the sound-suppressing enclosure receives feedback comprising a combination of the suppressed sound produced by the sound-suppressing enclosure and antinoise produced by one or more speakers mounted to a headrest disposed within the interior cavity of the sound-suppressing enclosure. The speakers are controlled to produce the antinoise based on the feedback, such that the antinoise destructively interferes with frequencies of the suppressed sound that are above the threshold frequency.

Abstract: Active noise control (ANC) is performed within a vehicle. Suppressed sound is produced by suppressing frequencies of ambient sound above a threshold frequency that enter an interior cavity of a sound-suppressing enclosure disposed within, and spaced from, interior walls of the vehicle. A microphone disposed within the interior cavity of the sound-suppressing enclosure receives feedback comprising a combination of the suppressed sound produced by the sound-suppressing enclosure and antinoise produced by one or more speakers mounted to a headrest disposed within the interior cavity of the sound-suppressing enclosure. The speakers are controlled to produce the antinoise based on the feedback, such that the antinoise destructively interferes with frequencies of the suppressed sound that are above the threshold frequency.

Abstract: An active noise control (ANC) system uses a proportional integral (PI) controller to produce a control signal based on feedback that comprises a combination of ambient sound and antinoise. The ANC system generates a corrected control signal based on the control signal and a configurable filtering parameter, and produces the antinoise under control of the corrected control signal such that the antinoise destructively interferes with frequencies of the ambient sound to produce the feedback. The ANC system uses a microphone to receive the feedback and provide the feedback to the PI controller.