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1. 发明授权

US10468048B2 Mic covering detection in personal audio devices 有权
公开(公告)号：US10468048B2
公开(公告)日：2019-11-05
申请号：US14578567
申请日：2014-12-22
申请人： Cirrus Logic, Inc.
发明人： Nitin Kwatra , Jeffrey Alderson , Jon D. Hendrix
IPC分类号： G10L21/0208 , G10K11/175 , G10K11/178 , H04M1/20
摘要： A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether one of the reference or error microphones is obstructed by comparing their received signal content and takes action to avoid generation of erroneous anti-noise.

2. 发明授权

US09165550B2 Acoustic isolation mechanism with membrane 有权
标题翻译：隔膜隔声机构
公开(公告)号：US09165550B2
公开(公告)日：2015-10-20
申请号：US14289521
申请日：2014-05-28
申请人： Otter Products, LLC
发明人： Curtis R. Richardson , John H. Loudenslager , Jamie L. Johnson , Jason M. Thompson , Jonathan D. Lucas , Jeffrey M. Borra
IPC分类号： H04M1/00 , G10K11/18 , H04B1/3888 , H04M1/03 , H04M1/19 , H04M1/20
CPC分类号： A45C11/00 , A45C2011/002 , A45C2011/003 , A45F5/00 , G10K11/002 , G10K11/18 , H04B1/3888 , H04M1/035 , H04M1/19 , H04M1/20 , H05K5/0217 , H05K5/03 , H05K5/068
摘要： A removable case for an electronic device may have an acoustic isolation mechanism between the removable case and an acoustic component on the electronic device. The acoustic isolation mechanism may be a compressible component that may provide an acoustic seal between an inner surface of the removable case and an exterior surface of the electronic device, and may include a waterproof acoustic membrane. The waterproof membrane prevents the entry of water while reacting to sound pressure changes to acoustically couple the electronic device with sounds outside the case. The acoustic isolation mechanism may be constructed of several different materials and several different manufacturing processes.
摘要翻译：用于电子设备的可拆卸外壳可以在可拆卸外壳和电子设备上的声学元件之间具有声学隔离机构。声学隔离机构可以是可以在可拆卸壳体的内表面和电子设备的外表面之间提供声学密封的可压缩部件，并且可以包括防水隔膜。防水膜防止水对声压的变化作出反应，从而将电子设备与外壳之外的声音进行声学耦合。声学隔离机构可以由几种不同的材料和几种不同的制造工艺构成。

3. 发明授权

US09036816B1 Frequency domain acoustic echo cancellation using filters and variable step-size updates 有权
标题翻译：使用滤波器和可变步长更新的频域声学回声消除
公开(公告)号：US09036816B1
公开(公告)日：2015-05-19
申请号：US14210154
申请日：2014-03-13
申请人： Amazon Technologies, Inc.
发明人： Robert Ayrapetian , Yuwen Su , Arnaud Jean-Louis Charton
IPC分类号： H04M9/08 , H04M1/20 , H04B3/23
CPC分类号： H04M1/20 , H04B3/232 , H04M9/082
摘要： A acoustic echo canceller (AEC) system may be configured to perform echo cancellation in the frequency domain. Features are disclosed for determining an estimated echo in the frequency domain using adaptive filters. An adaptive filter corresponding to a frequency bin can comprise a plurality of filter taps. Additional features are disclosed for updating the adaptive filter. In addition, a frequency-bin dependent step size controller may be used to control a step size used in updating the adaptive filters. Features are disclosed for determining the frequency-bin dependent step size.
摘要翻译：声学回声消除器（AEC）系统可以被配置为在频域中执行回声消除。公开了用于使用自适应滤波器来确定频域中的估计回波的特征。对应于频率仓的自适应滤波器可以包括多个滤波器抽头。公开了用于更新自适应滤波器的附加特征。此外，可以使用频率槽相关步长控制器来控制用于更新自适应滤波器的步长。公开了用于确定频率依赖步长的特征。

4. 发明申请

US20150104032A1 MIC COVERING DETECTION IN PERSONAL AUDIO DEVICES 审中-公开
标题翻译：个人音响设备的麦克风覆盖检测
公开(公告)号：US20150104032A1
公开(公告)日：2015-04-16
申请号：US14578567
申请日：2014-12-22
申请人： Cirrus Logic, Inc.
发明人： Nitin Kwatra , Jeffrey Alderson , Jon D. Hendrix
IPC分类号： G10L21/0208 , G10K11/175 , H04M1/20
CPC分类号： G10L21/0208 , G10K11/175 , G10K11/178 , G10K2210/108 , G10K2210/30231 , G10K2210/30391 , G10K2210/503 , H04M1/20
摘要： A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether one of the reference or error microphones is obstructed by comparing their received signal content and takes action to avoid generation of erroneous anti-noise.
摘要翻译：诸如无线电话的个人音频设备包括噪声消除电路，其自适应地从参考麦克风信号产生抗噪声信号，并将抗噪声信号注入到扬声器或其它换能器输出中以引起环境音频声音的消除。还可以在扬声器附近提供误差麦克风以估计从噪声消除电路通过换能器的电声路径。处理电路使用参考和/或误差麦克风，可选地与提供用于捕获近端语音的麦克风一起，通过比较其接收的信号内容来确定参考或误差麦克风中的一个是否被阻挡，并采取行动以避免产生错误的抗噪声。

5. 发明申请

US20050213432A1 Array device and mobile terminal 有权
标题翻译：阵列设备和移动终端
公开(公告)号：US20050213432A1
公开(公告)日：2005-09-29
申请号：US11101170
申请日：2005-04-07
申请人： Osamu Hoshuyama
发明人： Osamu Hoshuyama
IPC分类号： G01S3/80 , H04M1/03 , H04M1/19 , H04M1/20 , H04R3/00
CPC分类号： H04M1/03 , H04M1/19 , H04M1/20 , H04R1/406 , H04R3/005 , H04R2201/401 , H04R2499/11 , Y10S367/901
摘要： From output of a microphone, a first circuit generates a signal having first directivity which passes, and a second circuit generates a signal having second directivity which conversely cuts off, a signal arriving from a direction of a target sound source to output the obtained signals to a third circuit. Here, with two microphones disposed such that a noise source such as a speaker fails to locate at a position of a null of the second directivity, at the output of the second circuit, a signal arriving from the direction of the target sound source is cut off and a signal arriving from the direction of the noise source is passed. The third circuit corrects the output of the first circuit to output a signal with a signal arriving from the direction of the target sound source emphasized and a signal arriving from the direction of the noise source suppressed.
摘要翻译：从麦克风的输出，第一电路产生具有通过的第一方向性的信号，并且第二电路产生具有相反切断的第二方向性的信号，从目标声源的方向到达的信号，以将获得的信号输出到第三电路。这里，在两个麦克风被布置成使得诸如扬声器的噪声源不能定位在第二方向性的零点的位置处，在第二电路的输出处，从目标声源的方向到达的信号被切断并且从噪声源的方向到达的信号通过。第三电路校正第一电路的输出以输出信号，该信号具有从目标声源的方向到达的信号，并且从噪声源的方向到达的信号被抑制。

6. 发明授权

US5841856A Hands-free telephone set 失效
标题翻译：免提电话机
公开(公告)号：US5841856A
公开(公告)日：1998-11-24
申请号：US861382
申请日：1997-05-21
申请人： Yoshiyuki Ide
发明人： Yoshiyuki Ide
IPC分类号： H03H17/02 , H03H17/06 , H04B3/23 , H04B7/015 , H04B7/26 , H04M1/20 , H04M9/08 , H04Q7/38
CPC分类号： H04M9/082
摘要： A hands-free telephone set which is connected to both an analog cellular scheme line and a digital cellular scheme line includes first and second FIR filters. The first FIR filter is connected to a transmission path in an analog line connection state to cancel an acoustic echo generated when reception speech leaks to the transmission path. The second FIR filter is connected to a reception path in the analog line connection state, disconnected from the reception path, and cascaded to the first FIR filter in a digital line connection state. The second FIR filter constitutes a line echo canceler for canceling a line echo generated when transmission speech leaks to the reception path. In the digital line connection state, the cascaded first and second FIR filters constitute an acoustic echo canceler for canceling an acoustic echo generated when reception speech leaks to the transmission path.
摘要翻译：连接到模拟蜂窝方案线路和数字蜂窝方案线路的免提电话机包括第一和第二FIR滤波器。第一FIR滤波器以模拟线路连接状态连接到传输路径，以消除当接收语音泄漏到传输路径时产生的声学回声。第二FIR滤波器连接到模拟线路连接状态的接收路径，与接收路径断开，并且以数字线路连接状态级联到第一FIR滤波器。第二FIR滤波器构成线回波消除器，用于消除当传输语音泄漏到接收路径时产生的线路回声。在数字线路连接状态下，级联的第一和第二FIR滤波器构成声学回波消除器，用于消除当接收语音泄漏到传输路径时产生的声学回声。

7. 发明授权

US5778085A Audio conference device having echo canceller 失效
标题翻译：具有回声消除器的音频会议设备
公开(公告)号：US5778085A
公开(公告)日：1998-07-07
申请号：US636867
申请日：1996-04-23
申请人： Kiyoshi Sasaki
发明人： Kiyoshi Sasaki
IPC分类号： H04R1/02 , H04M1/20 , H04M1/62 , H04M9/08 , H04R25/00
CPC分类号： H04M1/20
摘要： In an audio conference device for housing an acoustic echo canceller function, a speaker and a microphone in a portable frame, a microphone 5 is provided in a tubular elastic member 4 whose tip end has been protruded in the shape of a funnel. This elastic member 4 is mounted so that its funnel-shaped tip end protrudes outwardly from the frame. With this structure, it is possible to prevent the speech sound, which propagates inside the frame from the speaker from being collected by the microphone, thus making it possible to reduce the degree of acoustic combination between the microphone and the speaker.
摘要翻译：在用于容纳声学回声消除器功能的音频会议设备中，便携式框架中的扬声器和麦克风，麦克风5设置在管状弹性构件4中，其末端已经以漏斗形状突出。该弹性构件4被安装成使得其漏斗形末端从框架向外突出。利用这种结构，可以防止从扬声器传播到帧内的语音由麦克风收集，从而可以降低麦克风和扬声器之间的声学组合程度。

8. 发明授权

US4747144A Amplifier with automatic inhibition of acoustic feedback 失效
标题翻译：放大器具有自动抑制声反馈
公开(公告)号：US4747144A
公开(公告)日：1988-05-24
申请号：US713960
申请日：1985-03-20
申请人： Daniel J. H. Admiraal , Benjamin Lopes Cardozo
发明人： Daniel J. H. Admiraal , Benjamin Lopes Cardozo
IPC分类号： H03G3/30 , H03G3/20 , H03G3/32 , H04R25/00 , H04M1/20 , H04R3/02
CPC分类号： H03G3/3005 , H03G3/32 , H04R25/453
摘要： An amplifier for acoustic signals provided with means for suppressing undesired acoustic feedback signals in a rapid manner. The amplifier includes a high-pass filter which separates a part of the signal to be amplified to obtain a control signal for reducing the gain of the amplifier when an acoustic feedback signal is detected. The output of the high-pass filter is connected to a periodicity detector, e.g. a single peak detector, which discriminates between an acoustic feedback signal having a regular periodicity and a signal having an irregular character, such as noise or speech. The control signal is derived from the output of the periodicity detector.
摘要翻译：一种用于声学信号的放大器，其具有用于以快速方式抑制不期望的声反馈信号的装置。放大器包括高通滤波器，其分离要被放大的信号的一部分以获得控制信号，以在检测到声反馈信号时降低放大器的增益。高通滤波器的输出连接到周期性检测器，例如，单峰检测器，其区分具有规则周期的声反馈信号和具有不规则字符的信号，例如噪声或语音。控制信号是从周期检测器的输出导出的。

9. 发明授权

US4595803A Bidirectional amplifier 失效
标题翻译：双向放大器
公开(公告)号：US4595803A
公开(公告)日：1986-06-17
申请号：US576500
申请日：1984-02-02
申请人： James T. Wright
发明人： James T. Wright
IPC分类号： H04B1/58 , H04M1/20
CPC分类号： H04B1/588
摘要： A bilateral circuit is operable for transmitting signals in two directions without generation of ringing due to feedback caused by the insertion of the circuit. The circuit may include gain for each of the signals to provide a bidirectional amplifier. The signals are passed through two separate paths, with a unidirectional amplifier in each path. A controlled sampling device is provided in each path for sampling the two signals. Any feedback loop between the two signals is disrupted by providing a phase displacement between the control signals for the two sampling devices.
摘要翻译：双向电路可用于在两个方向上传输信号，而不会由于电路插入引起的反馈而产生振铃。电路可以包括每个信号的增益以提供双向放大器。信号通过两条独立的路径，每条路径中都有一个单向放大器。在每个路径中提供受控采样装置，用于对两个信号进行采样。通过在两个采样装置的控制信号之间提供相位位移，两个信号之间的任何反馈回路被破坏。

10. 发明授权

US4525856A Amplifier arrangement for acoustic signals, provided with means for suppressing (undersired) spurious signals 失效
标题翻译：用于声信号的放大器布置，提供用于抑制（较低）杂散信号的装置
公开(公告)号：US4525856A
公开(公告)日：1985-06-25
申请号：US6144
申请日：1979-01-24
申请人： Daniel J. H. Admiraal , Benjamin Lopes Cardozo
发明人： Daniel J. H. Admiraal , Benjamin Lopes Cardozo
IPC分类号： H03G3/30 , H03G3/20 , H03G3/32 , H04R25/00 , H04M1/20 , H04R3/02
CPC分类号： H03G3/3005 , H03G3/32 , H04R25/453
摘要： An amplifier for acoustic signals provided with means for suppressing undersired acoustic feedback signals in a rapid manner. The amplifier includes a high-pass filter which separates a part of the signal to be amplified to obtain a control signal for reducing the gain of the amplifier when an acoustic feedback signal is detected. The output of the high-pass filter is connected to a periodicity detector, e.g. a single peak detector, which discriminates between an acoustic feedback signal having a regular periodicity and a signal having an irregular character, such as noise or speech. The control signal is derived from the output of the periodicity detector.
摘要翻译：一种用于声信号的放大器，其具有用于以快速方式抑制低音声反馈信号的装置。放大器包括高通滤波器，其分离要被放大的信号的一部分以获得控制信号，以在检测到声反馈信号时降低放大器的增益。高通滤波器的输出连接到周期性检测器，例如，单峰检测器，其区分具有规则周期的声反馈信号和具有不规则字符的信号，例如噪声或语音。控制信号是从周期检测器的输出导出的。

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