SYSTEM FOR ACTIVE NOISE CONTROL WITH ADAPTIVE SPEAKER SELECTION
First Claim
Patent Images
1. An active noise control system comprising:
- a memory in communication with the processor;
where the processor the processor is configured to select a first speaker group from a plurality of speakers, where the first speaker is selected to receive a corresponding anti-noise signal configured to drive the first speaker to produce sound waves to destructively interfere with an undesired sound present in at least one quiet zone;
the processor further configured to receive an a first error signal, where the first error signal is representative of a combination of sound waves produced by the first speaker group and the undesired sound detected in the at least one quiet zone;
the processor further configured to determine when a second active speaker group different than the first active speaker group is configured to produce a second error signal less than the first error signal, where the second error signal is representative of a combination of sound waves produced by the second speaker group and the undesired sound detected in the at least one quiet zone; and
the processor further configured to replace the first active speaker group with the second active speaker group.
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Abstract
An active noise control system generates an anti-noise signal to drive a first speaker group including at least one speaker to produce sound waves to destructively interfere with an undesired sound in at least one quiet zone. The active noise control system receives error signals representative of a combination of undesired sound and destructively interfering sound waves produced by the first speaker group. The active noise control system may select a second speaker group to replace the first speaker group based on the error signals.
138 Citations
22 Claims
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1. An active noise control system comprising:
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a memory in communication with the processor; where the processor the processor is configured to select a first speaker group from a plurality of speakers, where the first speaker is selected to receive a corresponding anti-noise signal configured to drive the first speaker to produce sound waves to destructively interfere with an undesired sound present in at least one quiet zone; the processor further configured to receive an a first error signal, where the first error signal is representative of a combination of sound waves produced by the first speaker group and the undesired sound detected in the at least one quiet zone; the processor further configured to determine when a second active speaker group different than the first active speaker group is configured to produce a second error signal less than the first error signal, where the second error signal is representative of a combination of sound waves produced by the second speaker group and the undesired sound detected in the at least one quiet zone; and the processor further configured to replace the first active speaker group with the second active speaker group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating an active noise control system, the method comprising:
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selecting a first speaker group from a plurality of speakers, where the first speaker is selected to receive a corresponding anti-noise signal configured to drive the first speaker to produce sound waves to destructively interfere with an undesired sound present in at least one quiet zone; receiving a first error signal, where the first error signal is representative of a combination of sound waves produced by the first speaker group and the undesired sound detected in the at least one quiet zone; determining when a second active speaker group different than the first active speaker group is configured to produce a second error signal less than the first error signal, where the second error signal is representative of a combination of sound waves produced by the second speaker group and the undesired sound detected in the at least one quiet zone; and replacing the first active speaker group with the second active speaker group. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A computer-readable medium comprising a plurality of instructions executable by a processor to operate an active noise control system, the computer-readable medium comprising:
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instructions to select a first speaker group from a plurality of speakers, where the first speaker is selected to receive a corresponding anti-noise signal configured to drive the first speaker to produce sound waves to destructively interfere with an undesired sound present in at least one quiet zone; instructions to receive a first error signal, where the first error signal is representative of a combination of sound waves produced by the first speaker group and the undesired sound detected in the at least one quiet zone; instructions to determine when a second active speaker group different than the first active speaker group is configured to produce a second error signal less than the first error signal, where the second error signal is representative of a combination of sound waves produced by the second speaker group and the undesired sound detected in the at least one quiet zone; and instructions to replace the first active speaker group with the second active speaker group. - View Dependent Claims (19)
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- 20. The computer-readable medium of plain 19 further comprising instructions to receive a respective temporary error signal for each of the speakers not included in the first active speaker group, where each respective temporary error signal is representative of a combination of sound waves produced by the respective speaker not included in the first active speaker group, the first active speaker group, and the undesired sound detected in the at least one quiet zone sound.
Specification