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    ACTIVE NOISE CANCELLING METHOD AND ACTIVE NOISE CANCELLING EARPIECE
    2.
    发明公开
    ACTIVE NOISE CANCELLING METHOD AND ACTIVE NOISE CANCELLING EARPIECE 审中-实审

    公开(公告)号：EP4369736A1

    公开(公告)日：2024-05-15

    申请号：EP22857006.5

    申请日：2022-12-28

    申请人： Shenzhen Goodix Technology Co., Ltd.

    发明人： LI, Guoliang ,  WANG, Lelin

    IPC分类号： H04R1/10

    CPC分类号： H04R1/1083 ,  H04R1/1016 ,  H04R2460/0120130101 ,  G10K11/17817 ,  G10K11/17827 ,  G10K11/17885 ,  G10K2210/108120130101 ,  G10K2210/50620130101 ,  G10K11/17854 ,  G10K11/17881 ,  G10K11/17823

    摘要： An active noise cancellation method and active noise cancellation earphones are provided, which may improve a noise cancellation effect of the active noise cancellation earphones. The active noise cancellation earphones include an in-ear microphone, an out-of-ear microphone, a speaker and a filter, and the method includes: determining a first primary path transfer function according to a first out-of-ear data collected by the out-of-ear microphone and a first in-ear data collected by the in-ear microphone when the speaker plays audio data; determining audio data received by the in-ear microphone according to the first in-ear data, the first out-of-ear data and the first primary path transfer function; determining a first secondary path transfer function according to the audio data played through the speaker and the audio data received by the in-ear microphone; and updating an operation coefficient of the filter to a first operation coefficient according to the first primary path transfer function and/or the first secondary path transfer function.

    A SYSTEM AND METHOD FOR ACTIVE REDUCTION OF A PREDEFINED AUDIO ACOUSTIC NOISE BY USING SYNCHRONIZATION SIGNALS
    5.
    发明公开
    A SYSTEM AND METHOD FOR ACTIVE REDUCTION OF A PREDEFINED AUDIO ACOUSTIC NOISE BY USING SYNCHRONIZATION SIGNALS 审中-公开
    利用同步信号主动降低预定音频声音噪声的系统和方法

    公开(公告)号：EP3304541A1

    公开(公告)日：2018-04-11

    申请号：EP16807011.8

    申请日：2016-06-01

    申请人： Oppenheimer, Yehuda ,  Salomonski, Yaron

    发明人： Oppenheimer, Yehuda ,  Salomonski, Yaron

    IPC分类号： G10K11/178

    CPC分类号： G10K11/17823 ,  G10K11/17815 ,  G10K11/17837 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/108 ,  G10K2210/3044 ,  G10K2210/3055 ,  G10K2210/3216 ,  H04R3/04 ,  H04R29/001

    摘要： Method and system for active reduction of a predefined audio acoustic signal (AAAS), also referred to as “noise”, in a quiet zone, without interfering undefined acoustic noise signals within as well as outside the quiet zone, by generating accurate antiphase AAAS signal. The accuracy of the generated antiphase AAAS is obtained by employing a unique synchronization signal(s) (SYNC) which is generated and combined with the predefined AAAS. The combined signal is electrically transmitted (referred to as the “electric channel”) to a processing “quieting component”. Simultaneously, the generated SYNC signal is acoustically broadcasted near the predefined AAAS and merges with it. A microphone in the quiet zone receives the merged acoustic signals that arrive via the air (referred to as the “acoustical channel”) to the quiet zone and a receiver in the quieting component receives the combined electrical AAAS and SYNC signal that arrive wire or wireless to the quiet zone. In the quiet component the SYNC is detected from both electrical and acoustical channels, the detected SYNC signals with the electrically received AAAS signal are used to calculate the timing and momentary amplitude for generating an accurate acoustic antiphase AAAS signal to cancel the acoustic predefined AAAS. By continuously and periodically updating the SYNC signal enables to dynamically evaluate acoustical environmental distortions that might appear due to echo, reverberations, frequency non-linear response, or due to other distortions mechanisms.

    SYSTEMS AND METHODS FOR ADAPTIVE NOISE CANCELLATION BY ADAPTIVELY SHAPING INTERNAL WHITE NOISE TO TRAIN A SECONDARY PATH
    8.
    发明公开
    SYSTEMS AND METHODS FOR ADAPTIVE NOISE CANCELLATION BY ADAPTIVELY SHAPING INTERNAL WHITE NOISE TO TRAIN A SECONDARY PATH 审中-公开
    系统和自适应降噪BY自适应内整形白噪声方法进行训练次路径

    公开(公告)号：EP3044780A1

    公开(公告)日：2016-07-20

    申请号：EP14759074.9

    申请日：2014-08-04

    申请人： Cirrus Logic, Inc.

    发明人： MILANI, Ali Abdollahzadeh ,  LU, Yang ,  LI, Ning ,  ZHOU, Dayong

    IPC分类号： G10K11/178

    CPC分类号： G10K11/1788 ,  G10K11/17854 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  G10K2210/30232 ,  G10K2210/3045 ,  G10K2210/3049 ,  H03F1/0211 ,  H03F3/181 ,  H03F3/52

    摘要： A processing circuit may include: (i) an adaptive filter having a response that generates an anti-noise signal from a reference microphone signal, wherein the response is shaped in conformity with the reference microphone signal and a playback corrected error, and wherein the playback corrected error is based on a difference between an error microphone signal and a secondary path estimate; (ii) a secondary path estimate filter configured to model an electro-acoustic path of a source audio signal and having a response that generates a secondary path estimate from the source audio signal; (iii) a secondary coefficient control block that shapes the response of the secondary path estimate filter in conformity with the source audio signal and the playback corrected error by adapting the response of the secondary path estimate filter to minimize the playback corrected error; and (iv) a noise injection portion for injecting a noise signal into the source audio signal, wherein the noise signal is shaped based on the playback corrected error.

    摘要翻译： 处理电路可以包括：（i）至自适应滤波器具有响应并产生从参考麦克风信号，worin响应的形状与所述参考麦克风信号和再现校正的误差一致的抗噪声信号的速率，并且worin重放 校正的误差是基于在误差麦克风信号和一个次级路径估计之间的差; （ii）被构造为源的音频信号的电声路径的模型中的次级路径估计滤波器，并具有响应确实基因速率从源音频信号的二次路径估计值; （ⅲ）二次系数控制块形状做了次级路径估计滤波器的符合所述源的音频信号和通过调整次级路径估计滤波器的响应，以最小化错误校正再现校正的再现错误的响应; 和（iv）用于注入噪声信号到源的音频信号，所述worin噪声信号的噪声注入部被成形基于校正后的重放误差。

    A NOISE REDUCTION CIRCUIT WITH MONITORING FUNCTIONALITY
    9.
    发明公开
    A NOISE REDUCTION CIRCUIT WITH MONITORING FUNCTIONALITY 有权
    RAUSCHUNTERDRÜCKUNGSSCHALTUNGMITÜBERWACHUNGSFUNKTION

    公开(公告)号：EP2569954A4

    公开(公告)日：2015-11-25

    申请号：EP11780891

    申请日：2011-04-21

    申请人： CREATIVE TECH LTD

    发明人： CHEAH CHEE SIN ,  KOH HUOY RU RACHEL ,  NG BOON CHEONG RAYMOND

    IPC分类号： H04R5/04 ,  H04R5/033

    CPC分类号： G10K11/17823 ,  G10K11/17827 ,  G10K11/17885 ,  G10K2210/1081 ,  G10K2210/3026

    摘要： A noise reduction circuit 200 for a headphone 100 is disclosed herein. In a described embodiment, the headphone 100 includes a speaker driver 110 and the circuit 200 comprises a microphone 112 configured to convert ambient sound into a corresponding electrical ambient signal and which is disposed adjacent to the speaker driver's diaphragm. The circuit 200 further includes an active noise reduction path configured to provide active noise reduction of the ambient sound based on the corresponding electrical ambient signal and a vocal signal compensation path configured to restore attenuated signals within the vocal range of the corresponding electrical ambient signal to increase audibility of vocal signals of the ambient sound. The circuit 200 also includes a switching device 204,210 arranged to selectively deliver the corresponding electrical ambient signal to the active noise reduction path or to the vocal signal compensation path.

    摘要翻译： 本文公开了一种用于耳机100的降噪电路200。 在所描述的实施例中，耳机100包括扬声器驱动器110，并且电路200包括被配置为将环境声音转换成相应的电气环境信号并被设置为与扬声器驱动器的隔膜相邻的麦克风112。 电路200还包括有源噪声降低路径，其被配置为基于相应的电气环境信号和配置用于恢复相应的电气环境信号的声音范围内的衰减的信号来提供环境声音的有源降噪，以增加 声音信号的环境声音的可听性。 电路200还包括开关装置204,210，其被布置为选择性地将对应的电气环境信号传送到有源噪声降低路径或声音信号补偿路径。