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    METHOD FOR MASKING UNDESIRABLE DISTURBING NOISES AND VEHICLE
    2.
    发明公开
    METHOD FOR MASKING UNDESIRABLE DISTURBING NOISES AND VEHICLE 审中-公开

    公开(公告)号：US20240282287A1

    公开(公告)日：2024-08-22

    申请号：US18682579

    申请日：2022-07-22

    申请人： MERCEDES-BENZ GROUP AG

    发明人： Thomas KÜPPERS ,  Dirk LIESKE ,  Alexander TREIBER

    IPC分类号： G10K11/175 ,  H03G3/30 ,  H04R3/04

    CPC分类号： G10K11/1752 ,  H03G3/301 ,  H04R3/04 ,  H03G2201/103 ,  H04R2499/13

    摘要： Synthetic noises are generated to mask undesirable disturbing noises arising during the operation of a vehicle. The synthetic noise is generated from an unmodulated synthetic noise to adjust a desired sound characteristic by multiplication with at least one filter and/or amplifier which is dependent on a vehicle parameter. A pitch of all acoustic signals of which the modulated synthetic noise is composed is kept constant during an emission of the modulated synthetic noise. The unmodulated synthetic noise is designed as 1/f noise, and is pre-modulated by at least one static filter before being modulated by the at least one filter and/or amplifier which is dependent on the vehicle parameter.

    Rotor noise reduction using signal processing
    3.
    发明授权
    Rotor noise reduction using signal processing 有权

    公开(公告)号：US12065257B2

    公开(公告)日：2024-08-20

    申请号：US18137333

    申请日：2023-04-20

    申请人： Kitty Hawk Corporation

    发明人： Cameron Robertson

    IPC分类号： B64D31/06 ,  B64C29/00 ,  G10K11/175 ,  H02P23/06

    CPC分类号： B64D31/06 ,  B64C29/0025 ,  G10K11/1752 ,  H02P23/06

    摘要： A takeoff location and a landing location are received for an autonomous vertical takeoff and landing (VTOL) vehicle that includes a plurality of rotors. An autonomous and noise-reduced flight trajectory for the autonomous VTOL vehicle is determined based at least in part on the takeoff location, the landing location, a jerk function, and a noise function, including by minimizing the jerk function and minimizing the noise function. A set of one or more desired forces or moments is determined for the autonomous VTOL vehicle based at least in part on autonomous and noise-reduced flight trajectory. A plurality of motor control signals is determined for the plurality of rotors based at least in part on the set of one or more desired forces or moments.

    Masking sound adjustment method and masking sound adjustment device
    9.
    发明授权
    Masking sound adjustment method and masking sound adjustment device 有权

    公开(公告)号：US11996073B2

    公开(公告)日：2024-05-28

    申请号：US18080087

    申请日：2022-12-13

    申请人： YAMAHA CORPORATION

    发明人： Shinichi Kato

    IPC分类号： G10K11/175 ,  G10K11/178

    CPC分类号： G10K11/1754 ,  G10K11/1781

    摘要： A masking sound adjustment method includes obtaining, in each of a plurality of frequency bands, a volume adjustment amount of a masking sound with respect to a volume of a conversation sound to be masked, based on a threshold value corresponding to a target word intelligibility of the conversation sound to be masked; and adjusting a volume of the masking sound in each of the plurality of frequency bands based on the volume adjustment amount.

    MODEL LEARNING DEVICE, DIRECTION OF ARRIVAL ESTIMATION DEVICE, MODEL LEARNING METHOD, DIRECTION OF ARRIVAL ESTIMATION METHOD, AND PROGRAM
    10.
    发明公开
    MODEL LEARNING DEVICE, DIRECTION OF ARRIVAL ESTIMATION DEVICE, MODEL LEARNING METHOD, DIRECTION OF ARRIVAL ESTIMATION METHOD, AND PROGRAM 审中-公开

    公开(公告)号：US20240118363A1

    公开(公告)日：2024-04-11

    申请号：US18276860

    申请日：2021-02-17

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Masahiro YASUDA

    IPC分类号： G01S3/808 ,  G10K11/175

    CPC分类号： G01S3/8083 ,  G10K11/1752

    摘要： Included are: a vector estimation unit that receives a real number spectrogram and an acoustic intensity vector as inputs and outputs a reverberation component of an acoustic intensity vector; an angle mask extraction unit that receives the acoustic intensity vector as an input and extracts an angle mask; a time-frequency mask estimation unit that receives the real number spectrogram, the acoustic intensity vector from which the reverberation component has been subtracted, and the angle mask as inputs, and outputs a time-frequency mask for noise suppression and sound source separation; a first sound source direction-of-arrival derivation unit that derives a sound source direction-of-arrival on the basis of an acoustic intensity vector obtained by applying the time-frequency mask to the acoustic intensity vector from which the reverberation component has been subtracted; a second sound source direction-of-arrival derivation unit that derives a sound source direction-of-arrival on the basis of an acoustic intensity vector obtained by applying the angle mask to the acoustic intensity vector from which the reverberation component has been subtracted; and a cost function calculation unit that calculates a cost function of a model on the basis of the derived sound source direction-of-arrival and the label, and updates a parameter of the model.