System for active noise control with adaptive speaker selection
AssigneeHarman International Industries, Incorporated
InventorsVasant Shridhar, Duane Wertz
Life of this patent
Estimating the term…
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.
Claims22
An active noise control system comprising:
- a memory in communication with a processor;
- where the processor is configured to select a first speaker group from a plurality of speakers, where the first speaker group is selected to receive a corresponding anti-noise signal configured to drive the first speaker group to produce sound waves to destructively interfere with an undesired sound present in at least one quiet zone;
- the processor further configured 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;
- the processor further configured to determine when a second speaker group different than the first 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 speaker group with the second speaker group.
A method of operating an active noise control system, the method comprising:
- selecting a first speaker group from a plurality of speakers with a processor, where the first speaker group is selected to receive a corresponding anti-noise signal configured to drive the first speaker group to produce sound waves to destructively interfere with an undesired sound present in at least one quiet zone;
- receiving a first error signal with the processor, 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 with the processor when a second speaker group different than the first 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 replacing the first speaker group with the second speaker group.
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:
- instructions to select a first speaker group from a plurality of speakers, where the first speaker group is selected to receive a corresponding anti-noise signal configured to drive the first speaker group 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 speaker group different than the first 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 speaker group with the second speaker group.
The computer-readable medium of plain 19 further comprising instructions to receive a respective temporary error signal for the each of the speakers not included in the first speaker group, where each respective temporary error signal is representative of a combination of sound waves produced by the each of the respective speakers not included in the first speaker group, the first speaker group, and the undesired sound detected in the at least one quiet zone.
Dependencies are inferred from the claim text.