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85 条记录 (耗时 0.014 秒)

    Variable gain active noise cancellation system with improved residual noise sensing
    61.
    发明授权
    Variable gain active noise cancellation system with improved residual noise sensing 失效
    活性Lärmunterdruckungsanordnung可变增益和改善的残余噪声测量

    公开(公告)号：EP0967592B1

    公开(公告)日：2007-01-24

    申请号：EP99203047.8

    申请日：1994-06-23

    申请人： NOISE CANCELLATION TECHNOLOGIES, INC.

    发明人： Jones, Owen

    IPC分类号： G10K11/178

    CPC分类号： G10K11/17857 ,  A61F2011/145 ,  G10K11/17855 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3011 ,  G10K2210/3013 ,  G10K2210/3019 ,  G10K2210/3028 ,  G10K2210/3056 ,  G10K2210/3214 ,  G10K2210/503

    摘要： An active noise cancellation system includes a series of features for more effective cancellation, greater reliability, and improved stability. A particular feature adapted for headset systems includes locating a residual microphone radially offset from the centre of a sound generator to detect a signal more similar to that incident upon the eardrum of the user. In addition, an open back headset design includes perforations on the side of the headset instead of the back, so that the perforations are less susceptible to inadvertent blockage. The system also includes a mechanism for detecting changes in the acoustic characteristics of the environment that may be caused, for example, by pressure exerted upon the earpieces, and that may destabilize the cancellation system. The system automatically responds to such changes, for example, by reducing the gain or the frequency response of the system to preserve stability. The system further includes other methods for detecting imminent instability and compensating, such as detecting the onset of signals within enhancement frequencies characteristic of the onset of instability, and adjusting the gain of frequency response of the system or suppressing the enhanced signals. The system further includes a mechanism for conserving battery life by turning the system off when sound levels are low, or adjusting the power supply to the system to correspond to the current power requirements of the system.

    VARIABLE GAIN ACTIVE NOISE CANCELLATION SYSTEM WITH IMPROVED RESIDUAL NOISE SENSING
    62.
    发明公开
    VARIABLE GAIN ACTIVE NOISE CANCELLATION SYSTEM WITH IMPROVED RESIDUAL NOISE SENSING 失效
    ACTIVELÄRMUNTERDRUCKUNGSANORDNUNG可变增益和改进的残余噪声测量

    公开(公告)号：EP0705472A1

    公开(公告)日：1996-04-10

    申请号：EP94922444.0

    申请日：1994-06-23

    申请人： NOISE CANCELLATION TECHNOLOGIES, INC.

    发明人： JONES, Owen

    IPC分类号： A61F11 ,  G10K11

    CPC分类号： G10K11/17857 ,  A61F2011/145 ,  G10K11/17855 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3011 ,  G10K2210/3013 ,  G10K2210/3019 ,  G10K2210/3028 ,  G10K2210/3056 ,  G10K2210/3214 ,  G10K2210/503

    摘要： An active noise cancellation system includes a series of features for more effective cancellation, greater reliability, and improved stability. A particular feature adapted for headset systems includes locating a residual microphone radially offset from the centre of a sound generator to detect a signal more similar to that incident upon the eardrum of the user. In addition, an open back headset design includes perforations on the side of the headset instead of the back, so that the perforations are less susceptible to inadvertent blockage. The system also includes a mechanism for detecting changes in the acoustic characteristics of the environment that may be caused, for example, by pressure exerted upon the earpieces, and that may destabilize the cancellation system. The system automatically responds to such changes, for example, by reducing the gain or the frequency response of the system to preserve stability. The system further includes other methods for detecting imminent instability and compensating, such as detecting the onset of signals within enhancement frequencies characteristic of the onset of instability, and adjusting the gain of frequency response of the system or suppressing the enhanced signals. The system further includes a mechanism for conserving battery life by turning the system off when sound levels are low, or adjusting the power supply to the system to correspond to the current power requirements of the system.

    AUDIO DATA PROCESSING METHOD AND APPARATUS, AND ELECTRONIC DEVICE
    66.
    发明公开
    AUDIO DATA PROCESSING METHOD AND APPARATUS, AND ELECTRONIC DEVICE 审中-实审

    公开(公告)号：EP4373133A1

    公开(公告)日：2024-05-22

    申请号：EP22841078.3

    申请日：2022-06-02

    申请人： RealMe Chongqing Mobile Telecommunications Corp., Ltd.

    发明人： LING, Huadong

    IPC分类号： H04R3/04

    CPC分类号： G10K11/17833 ,  G10K11/17881 ,  G10K2210/108120130101 ,  G10K2210/51120130101 ,  G10K2210/50320130101 ,  G10K11/17885 ,  G10K11/17827 ,  G10K11/17823

    摘要： An audio data processing method, applied to an audio playback device, comprising: acquiring a current audio playback mode corresponding to the audio playback device (202); if the current audio playback mode is an active noise reduction mode, collecting ambient sound, and performing characteristic analysis on a preset frequency band signal of the ambient sound to obtain a first low-frequency band signal characteristic value corresponding to the ambient sound (204); performing characteristic analysis on the preset frequency band signal of an audio signal played back by the audio playback device to obtain a second low-frequency band signal characteristic value corresponding to the audio signal (206); and if the characteristic value of the first low-frequency band signal is greater than a first preset threshold, adjusting a feedback noise reduction parameter of the audio playback device on the basis of the characteristic value of the second low-frequency band signal (208).