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Noise control apparatus and noise control method

  • US 10,425,734 B2
  • Filed: 10/04/2018
  • Issued: 09/24/2019
  • Est. Priority Date: 10/13/2017
  • Status: Active Grant
First Claim
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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:

  • 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.

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