NOISE REDUCTION DEVICE AND NOISE REDUCTION SYSTEM

    公开(公告)号:EP3483873A1

    公开(公告)日:2019-05-15

    申请号:EP17824327.5

    申请日:2017-07-06

    发明人: KUBOTA, Kenichi

    摘要: A system management device (501) notifies to drive a seat. A seat detector (582) detects that a seat position is in its actual usage state, a control speaker (340) outputs white noise generated by a white noise generator (337), and an acoustic transfer function including the path from the control speaker (340) to an error microphone (350) is identified by detecting this white noise with the error microphone (350). The system management device (501) also notifies an identification controller (538) of the initial values of the acoustic transfer function and a filter coefficient.

    NOISE REDUCTION DEVICE, NOISE REDUCTION SYSTEM, AND SOUND FIELD CONTROLLING METHOD

    公开(公告)号:EP3627492A1

    公开(公告)日:2020-03-25

    申请号:EP19186931.2

    申请日:2019-07-18

    IPC分类号: G10K11/178

    摘要: In the noise reduction device (530), the sound receiver (531) receives a noise signal acquired from the microphone (520). The sound source input unit (537) receives an input of a sound source signal from a sound source. The sound adjuster (53A) changes the intensity of the sound source signal relative to the intensity of the noise signal. The control sound generator (532) generates a control sound signal that reduces the noise signal. The control unit (533) controls the change of the intensity of the sound source signal and the generation of the control sound signal. The sound output (560) outputs the control sound signal to the speaker (540). The sound output (560) outputs to the speaker (540) the sound source signal at the intensity changed by the sound adjuster (53A).