Active noise control system and method
First Claim
1. An active noise control method, comprising:
- sensing an occupant position of an occupant within a defined space;
receiving an error signal from a microphone disposed at a microphone location within the defined space;
generating an anti-noise signal with a microprocessor based at least in part on the error signal and the sensed occupant position; and
transmitting the anti-noise signal to a loudspeaker to produce sound corresponding to the anti-noise signal.
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Accused Products
Abstract
Methods and systems are provided for active noise control in a vehicle. The system includes a position sensor for sensing an occupant position. A microphone receives audible noise and generates an error signal corresponding to the audible noise. A first controller is configured to receive the error signal from the microphone and generate a modified error signal by modifying the error signal based on the occupant position with respect to the microphone. A second controller is in communication with the first controller and configured to generate an anti-noise signal based at least in part on the modified error signal. The system also includes a loudspeaker in communication with the second controller for receiving the anti-noise signal from the second controller and producing sound corresponding to the anti-noise signal to negate at least some of the audible noise.
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Citations
20 Claims
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1. An active noise control method, comprising:
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sensing an occupant position of an occupant within a defined space; receiving an error signal from a microphone disposed at a microphone location within the defined space; generating an anti-noise signal with a microprocessor based at least in part on the error signal and the sensed occupant position; and transmitting the anti-noise signal to a loudspeaker to produce sound corresponding to the anti-noise signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An active noise control system, comprising:
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a position sensor for sensing an occupant position of an occupant within a defined space; a microphone disposed at a microphone location within the defined space for receiving audible noise and generating an error signal corresponding to the audible noise; a first controller in communication with said position sensor and said microphone and configured to receive the error signal from the microphone and generate a modified error signal by modifying the error signal based on the occupant position with respect to the microphone location; a second controller in communication with said first controller and configured to generate an anti-noise signal based at least in part on the modified error signal; and a loudspeaker in communication with said second controller for receiving the anti-noise signal from said second controller and producing sound corresponding to the anti-noise signal to negate at least some of the audible noise. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A vehicle having, comprising:
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a passenger compartment; and an active noise control system including a position sensor for sensing an occupant position of an occupant in said passenger compartment, a microphone disposed at a microphone location in said passenger compartment different from the occupant position for receiving audible noise and generating an error signal corresponding to the audible noise, a first controller in communication with said position sensor and said microphone and configured to receive the error signal from the microphone and generate a modified error signal by modifying the error signal based on the occupant position with respect to the microphone location, a second controller in communication with said first controller and configured to generate an anti-noise signal based at least in part on the modified error signal, and a loudspeaker in communication with said second controller for receiving the anti-noise signal from said second controller and producing sound corresponding to the anti-noise signal to negate at least some of the audible noise. - View Dependent Claims (18, 19, 20)
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Specification