Active noise reduction system
AssigneeHonda Motor Co., Ltd.
InventorsXun WANG, Toshio INOUE
Life of this patent
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Abstract
An active noise reduction system includes a canceling sound output device configured to output a canceling sound for canceling a noise, an error microphone configured to generate an error signal based on the noise and the canceling sound, and a controller configured to control the canceling sound output device based on the error signal, wherein the controller is configured to calculate a canceling sound propagation distance that is a distance from the canceling sound output device to the error microphone, and suppress a change in the canceling sound based on the canceling sound propagation distance.
Claims13
An active noise reduction system, comprising:
- a canceling sound output device configured to output a canceling sound for canceling a noise;
- an error microphone configured to generate an error signal based on the noise and the canceling sound;
- and
- a controller configured to control the canceling sound output device based on the error signal,
- wherein the controller is configured to
- calculate a canceling sound propagation distance that is a distance from the canceling sound output device to the error microphone, and
- suppress a change in the canceling sound based on the canceling sound propagation distance.
An active noise reduction system, comprising:
- a canceling sound output device configured to output a canceling sound for canceling a noise;
- an error microphone configured to generate an error signal based on the noise and the canceling sound;
- and
- a controller configured to control the canceling sound output device based on the error signal,
- wherein the controller is configured to
- calculate a canceling sound propagation distance that is a distance from the canceling sound output device to the error microphone, and
- cause the canceling sound output device to stop an output of the canceling sound in a case where the canceling sound propagation distance is equal to or greater than a prescribed threshold.
Dependencies are inferred from the claim text.