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1. 发明授权

US08644521B2 Adaptive noise control system with secondary path estimation 有权
标题翻译：具有二次路径估计的自适应噪声控制系统
公开(公告)号：US08644521B2
公开(公告)日：2014-02-04
申请号：US12696862
申请日：2010-01-29
申请人： Markus Christoph , Michael Wurm
发明人： Markus Christoph , Michael Wurm
IPC分类号： A61F11/06 , G10K11/16 , H03B29/00 , H04B15/00
CPC分类号： G10K11/17817 , G10K2210/1282 , G10K2210/3022
摘要： An active noise cancellation system includes an adaptive filter, a signal source, an acoustic actuator, a microphone, a secondary path and an estimation unit. The adaptive filter receives a reference signal representing noise, and provides a compensation signal in response to the received reference signal. The signal source provides a measurement signal. The acoustic actuator radiates the compensation signal and the measurement signal to the listening position. The microphone receives a first signal that is a superposition of the radiated compensation signal, the radiated measurement signal, and the noise signal at the listening position, and provides a microphone signal in response to the received first signal. The secondary path includes a secondary path system that represents a signal transmission path between an output of the adaptive filter and an output of the microphone. The estimation unit estimates a transfer characteristic of the secondary path system in response to the measurement signal and the microphone signal.
摘要翻译：主动噪声消除系统包括自适应滤波器，信号源，声学致动器，麦克风，次级路径和估计单元。自适应滤波器接收表示噪声的参考信号，并且响应于接收的参考信号提供补偿信号。信号源提供测量信号。声学执行器将补偿信号和测量信号辐射到收听位置。麦克风接收在收听位置处的辐射补偿信号，辐射测量信号和噪声信号的叠加的第一信号，并响应于接收的第一信号提供麦克风信号。次路径包括二次路径系统，其表示自适应滤波器的输出和麦克风的输出之间的信号传输路径。估计单元响应于测量信号和麦克风信号来估计辅路径系统的传输特性。

2. 发明申请

US20110206214A1 ACTIVE NOISE REDUCTION SYSTEM 有权
标题翻译：主动噪声减少系统
公开(公告)号：US20110206214A1
公开(公告)日：2011-08-25
申请号：US13035393
申请日：2011-02-25
申请人： Markus Christoph , Michael Wurm , Michael Perkmann
发明人： Markus Christoph , Michael Wurm , Michael Perkmann
IPC分类号： G10K11/16
CPC分类号： G10K11/1784 , G10K11/178 , G10K2210/1081 , G10K2210/3055
摘要： A system for actively reducing noise at a listening point, includes an earphone housing, a transmitting transducer, a receiving transducer and a controller. The transmitting transducer converts a first electric signal into a first acoustic signal, and radiates the first acoustic signal along a first acoustic path having a first transfer characteristic and along a second acoustic path having a second transfer characteristic. The receiving transducer converts the first acoustic signal and ambient noise into a second electrical signal. The controller compensates for the ambient noise by providing a noise reducing electrical signal to the transmitting transducer. The noise reducing electrical signal is derived from a filtered electrical signal that is provided by filtering the second electrical signal with a third transfer characteristic. The second and the third transfer characteristics together model the first transfer characteristic.
摘要翻译：用于主动降低收听点噪声的系统包括耳机外壳，发送换能器，接收换能器和控制器。发送换能器将第一电信号转换成第一声信号，并且沿着具有第一传输特性的第一声路径和沿着具有第二传输特性的第二声路径辐射第一声信号。接收传感器将第一声信号和环境噪声转换成第二电信号。控制器通过向发射传感器提供降噪电信号来补偿环境噪声。噪声降低电信号是从经过滤波的电信号得到的，该电信号通过用第三传输特性滤波第二电信号来提供。第二和第三传输特性一起模拟了第一传输特性。

3. 发明授权

US08903101B2 Active noise reduction system 有权
标题翻译：主动降噪系统
公开(公告)号：US08903101B2
公开(公告)日：2014-12-02
申请号：US13035393
申请日：2011-02-25
申请人： Markus Christoph , Michael Wurm , Michael Perkmann
发明人： Markus Christoph , Michael Wurm , Michael Perkmann
IPC分类号： G10K11/16 , G10K11/178
CPC分类号： G10K11/1784 , G10K11/178 , G10K2210/1081 , G10K2210/3055
摘要： A system for actively reducing noise at a listening point, includes an earphone housing, a transmitting transducer, a receiving transducer and a controller. The transmitting transducer converts a first electric signal into a first acoustic signal, and radiates the first acoustic signal along a first acoustic path having a first transfer characteristic and along a second acoustic path having a second transfer characteristic. The receiving transducer converts the first acoustic signal and ambient noise into a second electrical signal. The controller compensates for the ambient noise by providing a noise reducing electrical signal to the transmitting transducer. The noise reducing electrical signal is derived from a filtered electrical signal that is provided by filtering the second electrical signal with a third transfer characteristic. The second and the third transfer characteristics together model the first transfer characteristic.
摘要翻译：用于主动降低收听点噪声的系统包括耳机外壳，发送换能器，接收换能器和控制器。发送换能器将第一电信号转换成第一声信号，并且沿着具有第一传输特性的第一声路径和沿着具有第二传输特性的第二声路径辐射第一声信号。接收传感器将第一声信号和环境噪声转换成第二电信号。控制器通过向发射传感器提供降噪电信号来补偿环境噪声。噪声降低电信号是从经过滤波的电信号得到的，该电信号通过用第三传输特性滤波第二电信号来提供。第二和第三传输特性一起模拟了第一传输特性。

4. 发明申请

US20100195844A1 ADAPTIVE NOISE CONTROL SYSTEM 有权
标题翻译：自适应噪声控制系统
公开(公告)号：US20100195844A1
公开(公告)日：2010-08-05
申请号：US12696862
申请日：2010-01-29
申请人： Markus Christoph , Michael Wurm
发明人： Markus Christoph , Michael Wurm
IPC分类号： G10K11/16
CPC分类号： G10K11/17817 , G10K2210/1282 , G10K2210/3022
摘要： An active noise cancellation system includes an adaptive filter, a signal source, an acoustic actuator, a microphone, a secondary path and an estimation unit. The adaptive filter receives a reference signal representing noise, and provides a compensation signal in response to the received reference signal. The signal source provides a measurement signal. The acoustic actuator radiates the compensation signal and the measurement signal to the listening position. The microphone receives a first signal that is a superposition of the radiated compensation signal, the radiated measurement signal, and the noise signal at the listening position, and provides a microphone signal in response to the received first signal. The secondary path includes a secondary path system that represents a signal transmission path between an output of the adaptive filter and an output of the microphone. The estimation unit estimates a transfer characteristic of the secondary path system in response to the measurement signal and the microphone signal.
摘要翻译：主动噪声消除系统包括自适应滤波器，信号源，声学致动器，麦克风，次级路径和估计单元。自适应滤波器接收表示噪声的参考信号，并且响应于接收的参考信号提供补偿信号。信号源提供测量信号。声学执行器将补偿信号和测量信号辐射到收听位置。麦克风接收在收听位置处的辐射补偿信号，辐射测量信号和噪声信号的叠加的第一信号，并响应于接收的第一信号提供麦克风信号。次路径包括二次路径系统，其表示自适应滤波器的输出和麦克风的输出之间的信号传输路径。估计单元响应于测量信号和麦克风信号来估计辅路径系统的传输特性。

5. 发明申请

US20110305347A1 ADAPTIVE NOISE CONTROL 有权
标题翻译：自适应噪音控制
公开(公告)号：US20110305347A1
公开(公告)日：2011-12-15
申请号：US13160154
申请日：2011-06-14
申请人： Michael Wurm
发明人： Michael Wurm
IPC分类号： G10K11/16
CPC分类号： G10K11/178
摘要： Adaptive noise control for reducing power of an acoustic noise signal radiated from a noise source to a listening position comprises providing an electrical reference signal correlated with the acoustic noise signal; filtering the electrical reference signal with an adaptive filter to provide an electrical output signal; multiplying the electrical output signal of the adaptive filter by a gain factor to provide a first electrical compensation signal; filtering and multiplying the electrical output signal of the adaptive filter by the inverse of the gain factor to provide a second electrical compensation signal, the second gain factor being equal to 1 subtracted by the first gain factor; radiating the first electrical compensation signal to the listening position with an acoustic transducer; sensing a residual electrical error signal at the listening position; adding the second electrical compensation signal to the electrical error signal to provide a compensated error signal; and adapting filter coefficients of the adaptive filter as a function of the compensated error signal and the reference signal.
摘要翻译：用于降低从噪声源辐射到收听位置的声学噪声信号的功率的自适应噪声控制包括提供与声学噪声信号相关的电参考信号; 用自适应滤波器对电参考信号进行滤波以提供电输出信号; 将自适应滤波器的电输出信号乘以增益因子以提供第一电补偿信号; 对所述自适应滤波器的电输出信号进行滤波并乘以所述增益因子的倒数，以提供第二电补偿信号，所述第二增益因子等于1被所述第一增益因子减去; 用声换能器将第一电补偿信号发射到收听位置; 感测在收听位置处的残余电差错信号; 将第二电补偿信号添加到电差错信号以提供经补偿的误差信号; 以及将所述自适应滤波器的滤波器系数调整为所述补偿误差信号和所述参考信号的函数。

6. 发明申请

US20070058634A1 Interaction with wireless sensor devices 审中-公开
标题翻译：与无线传感器设备的互动
公开(公告)号：US20070058634A1
公开(公告)日：2007-03-15
申请号：US11236435
申请日：2005-09-27
申请人： Vipul Gupta , Michael Wurm
发明人： Vipul Gupta , Michael Wurm
IPC分类号： H04L12/56
CPC分类号： H04L67/12
摘要： A client node is communicatively coupled to a gateway node via a TCP/IP network. One or more constrained devices that include a wireless receiver/transmitter circuit communicate with the gateway node via a wireless network. The gateway node includes a web server that provides a dynamic web page accessible by the client node that has a list of the one or more active constrained devices on the wireless network. Each device entry in the list includes a URL that acts as an entry point for the client node to communicate with a web server in a corresponding constrained device. The gateway node automatically discovers a new device on the wireless network and populates the list of the one or more active constrained devices with the newly present constrained device. The new constrained device may be detected based on a periodic message sent by the constrained device indicating the constrained device has turned on its receiver/transmitter circuit for a period of time.
摘要翻译：客户端节点通过TCP / IP网络通信地耦合到网关节点。包括无线接收器/发射器电路的一个或多个约束设备经由无线网络与网关节点进行通信。网关节点包括web服务器，其提供由客户端节点访问的动态网页，其具有无线网络上的一个或多个主动约束设备的列表。列表中的每个设备条目包括一个URL，该URL用作客户端节点与对应受限设备中的Web服务器进行通信的入口点。网关节点自动发现无线网络上的新设备，并用新存在的受限设备填充一个或多个主动约束设备的列表。可以基于被约束设备发送的周期性消息来检测新的约束设备，指示被约束设备已经接通其接收机/发射机电路一段时间。

7. 发明授权

US08565443B2 Adaptive noise control system 有权
标题翻译：自适应噪声控制系统
公开(公告)号：US08565443B2
公开(公告)日：2013-10-22
申请号：US12483661
申请日：2009-06-12
申请人： Michael Wurm
发明人： Michael Wurm
IPC分类号： H03B29/00 , A61F2/20
CPC分类号： G10K11/17823 , G10K11/17825 , G10K11/17833 , G10K11/17881 , G10K11/17885 , G10K2210/3022 , G10K2210/3028
摘要： An active noise cancellation system that reduces, at a listening position, power of a noise signal radiated from a noise source to the listening position. The system includes an adaptive filter, at least one acoustic actuator and a signal processing device. The adaptive filter receives a reference signal representing the noise signal, and provides a compensation signal. The at least one acoustic actuator radiates the compensation signal to the listening position. The signal processing device evaluates and assesses the stability of the adaptive filter.
摘要翻译：一种主动噪声消除系统，其在收听位置降低从噪声源辐射到收听位置的噪声信号的功率。该系统包括自适应滤波器，至少一个声音致动器和信号处理装置。自适应滤波器接收表示噪声信号的参考信号，并提供补偿信号。所述至少一个声音致动器将所述补偿信号辐射到收听位置。信号处理装置评估和评估自适应滤波器的稳定性。

8. 发明授权

US09153226B2 Adaptive noise control 有权
标题翻译：自适应噪声控制
公开(公告)号：US09153226B2
公开(公告)日：2015-10-06
申请号：US13160154
申请日：2011-06-14
申请人： Michael Wurm
发明人： Michael Wurm
IPC分类号： A61F11/06 , G10K11/178 , H04B15/00
CPC分类号： G10K11/178
摘要： Adaptive noise control for reducing power of an acoustic noise signal radiated from a noise source to a listening position comprises providing an electrical reference signal correlated with the acoustic noise signal; filtering the electrical reference signal with an adaptive filter to provide an electrical output signal; multiplying the electrical output signal of the adaptive filter by a gain factor to provide a first electrical compensation signal; filtering and multiplying the electrical output signal of the adaptive filter by the inverse of the gain factor to provide a second electrical compensation signal, the second gain factor being equal to 1 subtracted by the first gain factor; radiating the first electrical compensation signal to the listening position with an acoustic transducer; sensing a residual electrical error signal at the listening position; adding the second electrical compensation signal to the electrical error signal to provide a compensated error signal; and adapting filter coefficients of the adaptive filter as a function of the compensated error signal and the reference signal.
摘要翻译：用于降低从噪声源辐射到收听位置的声学噪声信号的功率的自适应噪声控制包括提供与声学噪声信号相关的电参考信号; 用自适应滤波器对电参考信号进行滤波以提供电输出信号; 将自适应滤波器的电输出信号乘以增益因子以提供第一电补偿信号; 对所述自适应滤波器的电输出信号进行滤波并乘以所述增益因子的倒数，以提供第二电补偿信号，所述第二增益因子等于1被所述第一增益因子减去; 用声换能器将第一电补偿信号发射到收听位置; 感测在收听位置处的残余电差错信号; 将第二电补偿信号添加到电差错信号以提供经补偿的误差信号; 以及将所述自适应滤波器的滤波器系数调整为所述补偿误差信号和所述参考信号的函数。

9. 发明申请

US20120171978A1 Methods and Systems for Interference Rejection for Low Signals 有权
标题翻译：低信号干扰抑制方法与系统
公开(公告)号：US20120171978A1
公开(公告)日：2012-07-05
申请号：US13358894
申请日：2012-01-26
申请人： Arun Kumar Sharma , Michael Wurm
发明人： Arun Kumar Sharma , Michael Wurm
IPC分类号： H04B1/16 , H03H9/54
CPC分类号： H04B1/24 , H03H7/0161 , H03H7/06 , H03H7/175 , H03H7/1775 , H03H11/1208 , H03H2210/015 , H03H2210/028 , H03H2210/036 , H04B1/1638
摘要： A radio device and a method to operate a non-heterodyne receiver are provided. The radio device is configured to receive a signal waveform and to provide a wake-up signal to a second communication circuit when the signal waveform is a valid communication request; wherein the second communication circuit switches from a power saving state to an operating state upon receiving the wake-up signal from the non-heterodyne receiver. The non-heterodyne receiver further including an Electromagnetic interference (EMI) rejection circuit, including a narrow band filter and a broadband filter to reject an EMI signal. A filter circuit for a narrow passband circuit is also provided. The filter including a buffer circuit; a crystal oscillator coupled to the output of the buffer circuit; and an inverting amplifier coupled in parallel to the crystal oscillator.
摘要翻译：提供无线电设备和操作非外差接收机的方法。无线电设备被配置为当信号波形是有效通信请求时，接收信号波形并向第二通信电路提供唤醒信号; 其中当从非外差接收机接收到唤醒信号时，第二通信电路从功率节省状态切换到工作状态。非外差接收机还包括电磁干扰（EMI）抑制电路，其包括窄带滤波器和宽带滤波器以拒绝EMI信号。还提供了一种用于窄通带电路的滤波电路。所述滤波器包括缓冲电路; 耦合到缓冲电路的输出的晶体振荡器; 以及与晶体振荡器并联耦合的反相放大器。

10. 发明申请

US20100014685A1 ADAPTIVE NOISE CONTROL SYSTEM 有权
标题翻译：自适应噪声控制系统
公开(公告)号：US20100014685A1
公开(公告)日：2010-01-21
申请号：US12483661
申请日：2009-06-12
申请人： Michael Wurm
发明人： Michael Wurm
IPC分类号： G10K11/16
CPC分类号： G10K11/17823 , G10K11/17825 , G10K11/17833 , G10K11/17881 , G10K11/17885 , G10K2210/3022 , G10K2210/3028
摘要： An active noise cancellation system that reduces, at a listening position, power of a noise signal radiated from a noise source to the listening position. The system includes an adaptive filter, at least one acoustic actuator and a signal processing device. The adaptive filter receives a reference signal representing the noise signal, and provides a compensation signal. The at least one acoustic actuator radiates the compensation signal to the listening position. The signal processing device evaluates and assesses the stability of the adaptive filter.
摘要翻译：一种主动噪声消除系统，其在收听位置降低从噪声源辐射到收听位置的噪声信号的功率。该系统包括自适应滤波器，至少一个声音致动器和信号处理装置。自适应滤波器接收表示噪声信号的参考信号，并提供补偿信号。所述至少一个声音致动器将所述补偿信号辐射到收听位置。信号处理装置评估和评估自适应滤波器的稳定性。

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