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公开(公告)号：US10825440B2
公开(公告)日：2020-11-03
申请号：US16264409
申请日：2019-01-31
Inventor： Jeffrey Alderson , Ning Li , Ronald Coapstick
IPC: G10K11/178 , H04R1/40 , H04R3/00 , H04R29/00
Abstract: A method for calibrating an ANC-enabled portable audio device having microphones plays continuously a calibration sound by a calibrated speaker of a test station separate from the device. For each microphone of all the microphones, a microphone calibration value is computed using a comparison of a predetermined level and a measured level of an audio signal transduced by the microphone in response to the continuously-played calibration sound. The calibration is done without using a microphone of the test station. A processing element of the device may be programmed to make the comparison and computation. The processing element also causes a speaker of the device to generate a second calibration sound, measures a second level while the computed calibration value is applied to one of microphones (e.g., error microphone), and computes a calibration value for the device speaker using a comparison of a predetermined level and the second level.
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2.发明申请HYBRID ADAPTIVE NOISE CANCELLATION SYSTEM WITH FILTERED ERROR MICROPHONE SIGNAL 有权混合自适应噪声消除系统与过滤错误麦克风信号公开(公告)号：US20170053638A1
公开(公告)日：2017-02-23
申请号：US14832585
申请日：2015-08-21
Inventor： Dayong Zhou , Yang Lu , Ning Li , Nitin Kwatra , Antonio J. Miller
IPC: G10K11/178
CPC classification number: G10K11/178 , G10K11/16 , G10K11/17817 , G10K11/17879 , G10K11/17885 , G10K2210/108 , G10K2210/1081 , G10K2210/1082 , G10K2210/3017 , G10K2210/3022 , G10K2210/3026 , G10K2210/3027 , G10K2210/3035 , G10K2210/3039 , G10K2210/3045 , G10K2210/3049 , G10K2210/3053 , G10K2210/3055 , G10K2210/3056 , G10K2210/509 , H04R1/1083 , H04R3/002 , H04R3/005 , H04R2410/05 , H04R2460/01 , H04R2499/11
Abstract: In accordance with systems and methods of the present disclosure, an adaptive noise cancellation system may include an alignment filter configured to correct misalignment of a reference microphone signal and an error microphone signal by generating a misalignment correction signal.
Abstract translation: 根据本公开的系统和方法，自适应噪声消除系统可以包括对准滤波器，其被配置为通过产生未对准校正信号来校正参考麦克风信号和误差麦克风信号的未对准。
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公开(公告)号：US12284493B2
公开(公告)日：2025-04-22
申请号：US18073853
申请日：2022-12-02
Inventor： Ning Li , Hamid Sepehr , Ben Leslie , Aleksey Khenkin , Michael Kurek , Marco A. Janko , Vadim Konradi , Peter Foskey , Aaron Treptow
Abstract: A method of controlling a vibrational transducer, the method comprising: tracking a temperature metric of the vibrational transducer; and controlling a drive signal for the vibrational transducer, where the drive signal is limited to a value to protect the vibrational transducer from over excursion, and where said value is a function of the tracked temperature metric.
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4.发明授权Hybrid adaptive noise cancellation system with filtered error microphone signal 有权混合自适应噪声消除系统，滤波误差麦克风信号公开(公告)号：US09578415B1
公开(公告)日：2017-02-21
申请号：US14832585
申请日：2015-08-21
Inventor： Dayong Zhou , Yang Lu , Ning Li , Nitin Kwatra , Antonio J. Miller
IPC: H04R3/00 , G10K11/178 , G10K11/16
CPC classification number: G10K11/178 , G10K11/16 , G10K11/17817 , G10K11/17879 , G10K11/17885 , G10K2210/108 , G10K2210/1081 , G10K2210/1082 , G10K2210/3017 , G10K2210/3022 , G10K2210/3026 , G10K2210/3027 , G10K2210/3035 , G10K2210/3039 , G10K2210/3045 , G10K2210/3049 , G10K2210/3053 , G10K2210/3055 , G10K2210/3056 , G10K2210/509 , H04R1/1083 , H04R3/002 , H04R3/005 , H04R2410/05 , H04R2460/01 , H04R2499/11
Abstract: In accordance with systems and methods of the present disclosure, an adaptive noise cancellation system may include an alignment filter configured to correct misalignment of a reference microphone signal and an error microphone signal by generating a misalignment correction signal.
Abstract translation: 根据本公开的系统和方法，自适应噪声消除系统可以包括对准滤波器，其被配置为通过产生未对准校正信号来校正参考麦克风信号和误差麦克风信号的未对准。
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Patent Agency Ranking
公开(公告)号：US11159888B1
公开(公告)日：2021-10-26
申请号：US17025971
申请日：2020-09-18
Inventor： Ziyan Zou , Anthony S. Doy , Ning Li , Kaichow Lau , George E. Hardy , John L. Melanson
Abstract: Methods, systems, circuits and computer program products provide an output signal to drive an electromechanical transducer that selectively contains a cooling component when a thermal limit of a voice coil of the electromechanical transducer is exceeded and which air-cools the transducer by convection. An indication of a temperature of a voice coil of the electromechanical transducer is determined and compared with a thermal limit of the transducer. If the thermal limit of the transducer is exceeded by the indication of the temperature of the voice coil, the cooling component is introduced to the output signal that drives the transducer. The cooling component is a signal having a frequency within a low-frequency resonance portion of the response of the electromechanical transducer, so that additional air convection is caused at the transducer to remove heat from the voice coil due to the cooling component of the output signal.
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公开(公告)号：US11153682B1
公开(公告)日：2021-10-19
申请号：US17025960
申请日：2020-09-18
Inventor： Ning Li , George E. Hardy , Kaichow Lau , Anthony S. Doy , Ziyan Zou , John L. Melanson
Abstract: An audio output system for providing an output signal to a micro-speaker provides energy reduction and thermal protection by removing components of an input signal from which the output signal is generated, so that the audio power output system does not expend power reproducing portions of the audio information that would not be perceived by a listener. The micro-speaker has a resonant frequency such that substantial content of the audio information lies below the resonant frequency. A processing subsystem receives the audio information and generates the output signal by filtering the audio information with a response simulating the micro-speaker and an acoustic path to the listener, and comparing the filtered audio information with a frequency-dependent threshold of hearing. The processing subsystem then removes portions of the audio information that have an amplitude below the frequency-dependent threshold of hearing.
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公开(公告)号：US10820100B2
公开(公告)日：2020-10-27
申请号：US16803010
申请日：2020-02-27
Inventor： Carl Lennart Ståhl , Ning Li , Ziyan Zou
Abstract: Embodiments described herein relate to methods and apparatus for limiting the excursion of a transducer. The method comprises receiving a transducer signal; and limiting the transducer signal or a signal derived therefrom to generate a limited transducer signal for input into the transducer such that an electrical response caused by the limited transducer signal in an electrical model of the transducer would be less than a threshold electrical response, wherein the threshold electrical response has been determined by: inputting a stimulus input signal into the electrical model of the transducer, wherein the stimulus input signal is designed to cause the transducer to reach a maximum excursion; and determining the threshold electrical response as a maximum of the electrical response caused by the stimulus input signal in the electrical model of the transducer.
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公开(公告)号：US11490198B1
公开(公告)日：2022-11-01
申请号：US17384983
申请日：2021-07-26
Inventor： Ning Li , Teja Buddha , Mohamed Sabet , Doug Olsen
Abstract: A method for detecting wind noise incident on a single microphone may include receiving an audio signal indicative of sound incident on the single microphone, dividing the audio signal into a plurality of audio frames, and determining whether wind noise is incident on the single microphone based on a combination of a correlation metric between successive audio frames of the plurality of audio frames and a power ratio difference between a first power ratio and a second power ratio. The first power ratio may equal an amount of power present in a first frequency range of the audio signal to a total amount of power present in the audio signal across all frequencies. The second power ratio may equal an amount of power present in a second frequency range of the audio signal to the total amount of power present in the audio signal across all frequencies.
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公开(公告)号：US10789933B1
公开(公告)日：2020-09-29
申请号：US16516618
申请日：2019-07-19
Inventor： Ning Li , Dayong Zhou
IPC: G10K11/178
Abstract: An adaptive filter calculates frequency domain coefficients and in the frequency domain dynamically adjusts a leakage/step size parameter that controls adaptation of the adaptive filter based on the calculated frequency domain coefficients (e.g., based on a peak magnitude of the coefficients among frequency bins or on the magnitude of the coefficient of the corresponding frequency bin). The adaptive filter calculates the coefficients based on frequency domain input and error signals, dynamically adjusts a frequency domain coefficient magnitude limit parameter based on the calculated frequency domain coefficients (e.g., approximately proportionally to a peak magnitude of the coefficients among frequency bins) and uses the dynamically adjusted frequency domain coefficient magnitude limit parameter to limit a magnitude of the calculated frequency domain coefficients. The limit may be engaged above a frequency bin based on the peak magnitude frequency bin. An ANC system may employ the filter.
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