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公开(公告)号：US09980034B2
公开(公告)日：2018-05-22
申请号：US15792394
申请日：2017-10-24
Applicant: Avnera Corporation
Inventor： Amit Kumar , Shankar Rathoud , Mike Wurtz , Eric Etheridge , Eric Sorensen
IPC: H04R1/10 , H04R29/00 , G10K11/178
CPC classification number: H04R1/1041 , G10K11/178 , G10K2210/1081 , G10K2210/3026 , G10K2210/3027 , H04R1/1008 , H04R29/001 , H04R2460/01
Abstract: Disclosed is a signal processor for headphone off-ear detection. The signal processor includes an audio output to transmit an audio signal toward a headphone speaker in a headphone cup. The signal processor also includes a feedback (FB) microphone input to receive a FB signal from a FB microphone in the headphone cup. The signal processor also includes an off-ear detection (OED) signal processor to determine an audio frequency response of the FB signal over an OED frame as a received frequency response. The OED processor also determines an audio frequency response of the audio signal times an off-ear transfer function between the headphone speaker and the FB microphone as an ideal off-ear response. A difference metric si generated comparing the received frequency response to the ideal off-ear frequency response. The difference metric is employed to detect when the headphone cup is disengaged from an ear.
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公开(公告)号：US20180137851A1
公开(公告)日：2018-05-17
申请号：US15570273
申请日：2016-10-14
Applicant: Avnera Corporation
Inventor： Amit Kumar , Eric Sorensen
IPC: G10K11/178
CPC classification number: G10K11/178 , G10K2210/1081 , G10K2210/3014 , G10K2210/3026 , G10K2210/3027 , G10K2210/3028
Abstract: A system including an automatic noise canceling (ANC) headphone and a processor. The ANC headphone has a microphone configured to generate a microphone signal and at least two non-zero ANC gain levels. The processor is configured to receive the microphone signal, determine a characteristic of the microphone signal, identify a revised ANC level from the ANC gain levels based on a comparison of the characteristic to at least one threshold, and output a signal corresponding to the revised ANC level. Methods are also disclosed.
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公开(公告)号：US20180115815A1
公开(公告)日：2018-04-26
申请号：US15792394
申请日：2017-10-24
Applicant: Avnera Corporation
Inventor： Amit Kumar , Shankar Rathoud , Mike Wurtz , Eric Etheridge , Eric Sorensen
CPC classification number: H04R1/1041 , G10K11/178 , G10K2210/1081 , G10K2210/3026 , G10K2210/3027 , H04R1/1008 , H04R29/001 , H04R2460/01
Abstract: Disclosed is a signal processor for headphone off-ear detection. The signal processor includes an audio output to transmit an audio signal toward a headphone speaker in a headphone cup. The signal processor also includes a feedback (FB) microphone input to receive a FB signal from a FB microphone in the headphone cup. The signal processor also includes an off-ear detection (OED) signal processor to determine an audio frequency response of the FB signal over an OED frame as a received frequency response. The OED processor also determines an audio frequency response of the audio signal times an off-ear transfer function between the headphone speaker and the FB microphone as an ideal off-ear response. A difference metric si generated comparing the received frequency response to the ideal off-ear frequency response. The difference metric is employed to detect when the headphone cup is disengaged from an ear.
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公开(公告)号：US09946277B2
公开(公告)日：2018-04-17
申请号：US15078894
申请日：2016-03-23
Applicant: AVNERA CORPORATION
Inventor： Christopher D. Nilson
CPC classification number: G05F1/468
Abstract: A start-up circuit for a bandgap reference voltage generator circuit, including a first native transistor with a drain connected to a supply voltage of the bandgap reference voltage generator circuit and a source connected to a gate of the first native transistor; a low voltage transistor with a source connected to ground, a drain connected to the source of the first native transistor, and a gate connected to a resistor; a second native transistor with a source connected to the resistor, a gate connected to the source of the first native transistor; a high voltage transistor with a drain connected to a drain of the second native transistor and a source connected to the supply voltage; and a transistor with a gate connected to the gate of the first high voltage transistor and a drain which provides a start-up current for the bandgap reference voltage generator circuit.
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公开(公告)号：US20170332164A1
公开(公告)日：2017-11-16
申请号：US15662698
申请日：2017-07-28
Applicant: Avnera Corporation
Inventor： Manpreet Singh Khaira , Thomas Irrgang
CPC classification number: H04R1/20 , G06F1/1628 , G06F1/1632 , G06F2200/1633 , G06F2200/1634 , H04R1/026 , H04R1/28 , H04R1/2803 , H04R2205/021 , H04R2225/33 , H04R2400/03 , H04R2420/07
Abstract: A case having a recessed holding, an acoustic waveguide, and at least one audio transducer device. The recessed holding well is configured to receive and captively hold a stand-alone keyboard within the recessed holding well. The acoustic waveguide is integrated with a bottom cover of the case and between a bottom surface of the case and the recessed holding well. The at least one audio transducer device is coupled to a signal processing device and the acoustic waveguide. The at least one audio transducer device is configured to generate an audible audio output in response to an audio signal output from the signal processing device. The acoustic waveguide is configured to receive the audible audio output and generate an enhanced bass audio output.
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Patent Agency Ranking
公开(公告)号：US20170301336A1
公开(公告)日：2017-10-19
申请号：US15637659
申请日：2017-06-29
Applicant: AVNERA CORPORATION
Inventor： AMIT KUMAR , THOMAS IRRGANG , SHANKAR RATHOUD , ERIC SORENSEN
IPC: G10K11/178
CPC classification number: G10K11/178 , G10K11/17813 , G10K11/17881 , G10K2210/1081 , G10K2210/3025 , G10K2210/3026 , G10K2210/3027 , G10K2210/3045 , G10K2210/3055 , G10K2210/3056 , G10K2210/3214 , G10K2210/504 , H04R1/1083 , H04R29/00 , H04R2460/01
Abstract: A method of calibrating an earphone may include: securing an ANC earphone to a calibration fixture, the calibration fixture including an ear model configured to support the ANC earphone, the ear model having an ear canal configured to anatomically resemble a human ear canal and a concha configured to anatomically resemble a human ear concha, the ear canal extending from the concha to an inner end of the ear canal; generating, with the ANC earphone, an audio signal based on a reference tone; determining a characteristic of the audio signal; comparing the characteristic of the audio signal to a previously determined reference characteristic; and adjusting a gain value of the ANC earphone based on the comparing. Additional methods and apparatus are also disclosed.
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公开(公告)号：US20170277210A1
公开(公告)日：2017-09-28
申请号：US15078894
申请日：2016-03-23
Applicant: AVNERA CORPORATION
Inventor： Christopher D. Nilson
IPC: G05F1/46
CPC classification number: G05F1/468
Abstract: A start-up circuit for a bandgap reference voltage generator circuit, including a first native transistor with a drain connected to a supply voltage of the bandgap reference voltage generator circuit and a source connected to a gate of the first native transistor; a low voltage transistor with a source connected to ground, a drain connected to the source of the first native transistor, and a gate connected to a resistor; a second native transistor with a source connected to the resistor, a gate connected to the source of the first native transistor; a high voltage transistor with a drain connected to a drain of the second native transistor and a source connected to the supply voltage; and a transistor with a gate connected to the gate of the first high voltage transistor and a drain which provides a start-up current for the bandgap reference voltage generator circuit.
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公开(公告)号：US20170257702A1
公开(公告)日：2017-09-07
申请号：US15599331
申请日：2017-05-18
Applicant: Avnera Corporation
Inventor： Chris O'Connor , Xudong Zhao
Abstract: A low power, digital audio interface includes support for variable length coding depending on content of the audio data sent from the interface. A particularized coding system is implemented that uses techniques of silence detection, dynamic scaling, and periodic encoding to reduce sent data to a minimum. Other techniques include variable packet scaling based on an audio sample rate. Differential signaling techniques are also used. The digital audio interface may be used in a headphone interface to drive digital headphones. A detector in the interface may detect whether digital or analog headphones are coupled to a headphone jack and drive the headphone jack accordingly.
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公开(公告)号：US20170222793A1
公开(公告)日：2017-08-03
申请号：US15484408
申请日：2017-04-11
Applicant: AVNERA CORPORATION
Inventor： Samuel J. Peters, II , Eric P. Etheridge , Victor Lee Hansen , Alexander C. Stange
CPC classification number: H04L7/033 , G06F13/4295 , H04L7/0029 , H04L7/02
Abstract: A method can include a digital oversampler oversampling an input data stream, a rate generator selecting a frequency that is not less than an expected frequency of the input data stream, a rate generator clock of the rate generator outputting a clock signal that has the selected frequency, determining whether a sample receiver has received at least one sample of the input data stream from the digital oversampler, and, responsive to a determination that the sample receiver has received at least one sample of the input data stream from the digital oversampler, incrementing a sample counter by each received sample. The method can also include a sample rate converter accumulating samples from the sample receiver at the rate of a “toothless” clock signal, determining whether an output of the sample counter is greater than zero, and, responsive to a determination that the output of the sample counter is greater than zero, an AND gate passing the “toothless” clock signal to the sample rate converter.
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公开(公告)号：US20170199716A1
公开(公告)日：2017-07-13
申请号：US15470413
申请日：2017-03-27
Applicant: AVNERA CORPORATION
Inventor： MANPREET S. KHAIRA , SHAWN O'CONNOR , FRANK PRESTRELSKI , PATRICK ALLEN QUINN , RICHARD ANDREW SORENSEN , ERIC SORENSEN
CPC classification number: G06F3/162 , G06F3/017 , G06F3/0304 , G06F3/0346 , G06F3/0414 , G06F3/165 , G06F3/167 , G06F2200/1636 , H04R2201/02 , H04R2430/01
Abstract: A speaker system includes a case, an audio input, speakers, an accelerometer, and a computer processor. The audio input is structured to receive a program audio signal from an audio device. The speakers are configured to play an audio output based on the program audio signal, the audio output causing a vibration of the case. The accelerometer is configured to detect the vibration of the case as well as a user tap on the case. The computer processor is configured to identify a user gesture that includes the tap on the case, to identify the tap apart from the case vibration by processing the detected vibration of the case and the detected user tap on the case based on information from the program audio signal to separate the detected user tap from the detected vibration, and to commence a particular function associated with the user gesture.
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