Noise control apparatus and noise control method
First Claim
1. A noise control apparatus which reduces noise at a position away from a head of a passenger seated in a seat by a predetermined distance, the seat installed in a room under a noisy environment created by a predetermined noise source, comprising:
- a weight sensor installed in the seat;
a control speaker installed at a first position in the seat;
a noise detector which detects the noise from the noise source, and outputs a noise signal representing the detected noise;
a control circuit which obtains the noise signal outputted from the noise detector, and outputs a control signal to the control speaker, the control signal being that which reduces the noise at the position away from the head of the passenger by the predetermined distance; and
a memory which stores a plurality of control coefficients respectively set at different values depending on weights or on correlation values correlating with the weights, each control coefficient used to generate the control signal which reduces the noise at a position which becomes higher in a height direction from a seat surface of the seat as the corresponding weight becomes heavier, whereinthe control circuitreads the control coefficient corresponding to the weight of the passenger detected by the weight sensor or to a correlation value correlating with the weight from the memory, the control coefficient being one among the plurality of control coefficients,generates the control signal by use of the noise signal and the read control coefficient, andoutputs the generated control signal to the control speaker.
1 Assignment
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Accused Products
Abstract
Disclosed is a noise control apparatus which reduces noise at a position away from a head of a passenger in a seat in a room under a noisy environment created by a noise source. The apparatus includes: a weight sensor, and control speakers installed in the seat; a noise detector which detects the noise from the noise source, and outputs a noise signal; a control circuit which obtains the noise signal, and outputs a control signal for reducing the noise to the speakers; and a memory which stores control coefficients each used to generate the control signal for reducing the noise at a position which becomes higher from the seat as the corresponding weight becomes heavier. The circuit reads a coefficient corresponding to a detected weight or a correlation value from the coefficients, and outputs the control signal generated using the noise signal and the read coefficient to the speakers.
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Citations
18 Claims
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1. A noise control apparatus which reduces noise at a position away from a head of a passenger seated in a seat by a predetermined distance, the seat installed in a room under a noisy environment created by a predetermined noise source, comprising:
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a weight sensor installed in the seat; a control speaker installed at a first position in the seat; a noise detector which detects the noise from the noise source, and outputs a noise signal representing the detected noise; a control circuit which obtains the noise signal outputted from the noise detector, and outputs a control signal to the control speaker, the control signal being that which reduces the noise at the position away from the head of the passenger by the predetermined distance; and a memory which stores a plurality of control coefficients respectively set at different values depending on weights or on correlation values correlating with the weights, each control coefficient used to generate the control signal which reduces the noise at a position which becomes higher in a height direction from a seat surface of the seat as the corresponding weight becomes heavier, wherein the control circuit reads the control coefficient corresponding to the weight of the passenger detected by the weight sensor or to a correlation value correlating with the weight from the memory, the control coefficient being one among the plurality of control coefficients, generates the control signal by use of the noise signal and the read control coefficient, and outputs the generated control signal to the control speaker. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A noise control apparatus which reduces noise at a position away from a head of a passenger seated in a seat by a predetermined distance, the seat installed in a room under a noisy environment created by a predetermined noise source, comprising:
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an obtainer which obtains passenger ticket information or boarding pass information about the passenger seated in the seat; a control speaker installed at a first position in the seat; a noise detector which detects the noise from the noise source, and outputs a noise signal representing the detected noise; a control circuit which obtains the noise signal outputted from the noise detector, and outputs a control signal to the control speaker, the control signal being that which reduces the noise at the position away from the head of the passenger by the predetermined distance; and a memory which stores a plurality of control coefficients respectively set at different values depending on heights, each control coefficient used to generate the control signal which reduces the noise at a position away from the head of a passenger with a corresponding height by a predetermined distance when the passenger gets seated in the seat, wherein the control circuit detects a height of the passenger seated in the seat from the passenger ticket information or the boarding pass information obtained by the obtainer, reads the control coefficient corresponding to the detected height of the passenger from the memory, generates the control signal by use of the noise signal and the read control coefficient, and outputs the generated control signal to the control speaker. - View Dependent Claims (13, 14, 15, 16)
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17. A noise control method to be performed by a noise control apparatus which reduces noise at a position away from a head of a passenger seated in a seat by a predetermined distance, the seat installed in a room under a noisy environment created by a predetermined noise source, comprising:
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from a noise detector, obtaining a noise signal representing the noise from the noise source; from a weight sensor installed in the seat, obtaining a weight of the passenger detected by the weight sensor; from a memory, reading a control coefficient corresponding to the obtained weight of the passenger or to a correlation value correlating with the weight, among a plurality of control coefficients respectively set at different values depending on weights or on correlation values correlating with the weights, each control coefficient used to generate the control signal which reduces the noise at a position which becomes higher in a height direction from a seat surface of the seat as the corresponding weight becomes heavier; generating the control signal by use of the obtained noise signal and the read control coefficient; and outputting the generated control signal to a control speaker installed at a first position in the seat.
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18. A noise control method to be performed by a noise control apparatus which reduces noise at a position away from a head of a passenger seated in a seat by a predetermined distance, the seat installed in a room under a noisy environment created by a predetermined noise source, comprising:
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from a noise detector, obtaining a noise signal representing the noise from the noise source; detecting a height of the passenger seated in the seat from passenger ticket information or boarding pass information about the passenger obtained by a obtainer which obtains the passenger ticket information or the boarding pass information about the passenger seated in the seat; from a memory, reading a control coefficient corresponding to the detected height of the passenger among a plurality of control coefficients respectively set at different values depending on heights, each control coefficient used to generate the control signal which reduces the noise at a position away from the head of a passenger with a corresponding height by the predetermined distance when the passenger gets seated in the seat; generating the control signal by use of the obtained noise signal and the read control coefficient; and outputting the generated control signal to a control speaker installed at a first position in the seat.
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Specification