NOISE REDUCTION DEVICE
First Claim
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1. A noise reduction device comprising:
- a noise controller unit for generating a control sound signal to cancel out a noise;
a control sound output unit for outputting a control sound according to the control sound signal from the noise controller unit;
a residual sound detector for detecting a residual sound by superimposing the control sound on the noise; and
an obstacle detector for detecting an obstacle having potential for influencing detecting performance of the residual sound detector,wherein the noise controller unit generates the control sound signal according to data from the residual sound detector and the obstacle detector.
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Abstract
A noise reduction device of the present invention comprises a control filter unit for generating a control sound signal to cancel out a noise, a control speaker for outputting a control sound according to the control sound signal from the control filter unit, an error microphone for detecting a residual sound by superimposing the noise upon the control sound output from the control speaker, and an obstacle detector for detecting an obstacle around the error microphone, wherein the control filter unit generates the control sound signal according to data from the error microphone and the obstacle detector.
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Citations
11 Claims
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1. A noise reduction device comprising:
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a noise controller unit for generating a control sound signal to cancel out a noise; a control sound output unit for outputting a control sound according to the control sound signal from the noise controller unit; a residual sound detector for detecting a residual sound by superimposing the control sound on the noise; and an obstacle detector for detecting an obstacle having potential for influencing detecting performance of the residual sound detector, wherein the noise controller unit generates the control sound signal according to data from the residual sound detector and the obstacle detector. - View Dependent Claims (2, 3, 10, 11)
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4. A noise reduction device comprising:
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a noise detector for detecting a noise supplied from at least one noise source; a noise controller unit for generating a control sound signal to cancel out the noise detected by the noise detector; a control sound output unit for outputting a control sound according to the control sound signal from the noise controller unit; a residual sound detector for detecting a residual sound by superimposing the control sound on the noise supplied from the noise source; and an obstacle detector for detecting an obstacle having potential for influencing detecting performance of at least one of the noise detector and the residual sound detector, wherein the noise controller unit generates the control sound signal according to data from the noise detector, the residual sound detector and the obstacle detector. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification