公开(公告)号：US11303991B2

公开(公告)日：2022-04-12

申请号：US16686786

申请日：2019-11-18

Applicant: Amazon Technologies, Inc.

Inventor： Ludger Solbach

IPC: H04R1/10 ,  G06F3/16 ,  G10L21/0232 ,  H04R1/40 ,  H04R3/00

Abstract: A beamformer system includes an in-ear audio device, such as an earbud, that has three microphones. Two microphones may be disposed on an external face of the audio-device; one microphone may be disposed in or near the ear canal of a user. Data from two microphones is phase-adjusted and combined; a reference signal is generated by phase-adjusting and removing data from the two microphones from data from a third microphone. The combined data is filtered using the reference signal to remove any residual echo, and the resulting data may be used for communications, speech processing, or other uses.

公开(公告)号：US10516934B1

公开(公告)日：2019-12-24

申请号：US16142992

申请日：2018-09-26

Applicant: Amazon Technologies, Inc.

Inventor： Ludger Solbach

IPC: H04R1/10 ,  H04R1/40 ,  H04R3/00 ,  G06F3/16 ,  G10L21/0232

Abstract: A beamformer system includes an in-ear audio device, such as an earbud, that has three microphones. Two microphones may be disposed on an external face of the audio-device; one microphone may be disposed in or near the ear canal of a user. Data from two microphones is phase-adjusted and combined; a reference signal is generated by phase-adjusting and removing data from the two microphones from data from a third microphone. The combined data is filtered using the reference signal to remove any residual echo, and the resulting data may be used for communications, speech processing, or other uses.

公开(公告)号：US10147439B1

公开(公告)日：2018-12-04

申请号：US15474197

申请日：2017-03-30

Applicant: Amazon Technologies, Inc.

Inventor： Trausti Thor Kristjansson ,  Mohamed Mansour ,  Amit Singh Chhetri ,  Ludger Solbach

IPC: G06F3/00 ,  G10L21/0364 ,  G10L15/22 ,  G10L21/0232 ,  G10L13/00 ,  G10L21/0216

Abstract: A speech-capturing device that can modulate its output audio data volume based on environmental sound conditions at the location of a user speaking to the device. The device detects the sound pressure of a spoken utterance at the device location and determines the distance of the user from the device. The device also detects the sound pressure of noise at the device and uses information about the location of the noise source and user to determine the sound pressure of noise at the location of the talker. The device can then adjust the gain for output audio (such as a spoken response to the utterance) to ensure that the output audio is at a certain desired sound pressure when it reaches the location of the user.

公开(公告)号：US12114134B1

公开(公告)日：2024-10-08

申请号：US17955355

申请日：2022-09-28

Applicant: Amazon Technologies, Inc.

Inventor： Shobha Devi Kuruba Buchannagari ,  Ludger Solbach ,  Madhuri Saraf ,  Andrew Jackson Stockton, X

IPC: H04R25/00

CPC classification number: H04R25/505

Abstract: An enhancement equalizer (EEQ) can be configured to compensate for hearing loss. An app or application can assist a user with measuring hearing loss at various frequencies (e.g., threshold sensitivity versus normal hearing). Using these measurements, the system may compute a set of filters for an EEQ that can boost different frequencies by different amounts corresponding to the user's sensitivity to that frequency. The measurement and resulting EEQ may be earphone specific (e.g., both the measurement and the filter computation may depend on the particular type/model of earphone used). In some implementations, the system may allow the user to select correction strength that controls an amount of correction applied (e.g., 25%, 50%, or 75% of full correction). In some implementations, the system may adjust the EEQ and/or correction strength according to the volume of playback (e.g., by applying less correction at higher playback volumes to avoid triggering earphone limiters).

公开(公告)号：US11172285B1

公开(公告)日：2021-11-09

申请号：US16707967

申请日：2019-12-09

Applicant: Amazon Technologies, Inc.

Inventor： Ke Li ,  Alex Kanaris ,  Ludger Solbach ,  Carlo Murgia ,  Kuan-Chieh Yen ,  Tarun Pruthi

IPC: H04R1/10 ,  H04R1/40 ,  H04R3/00

Abstract: This disclosure describes, in part, techniques to process audio signals to lessen the impact that wind and/or other environmental noise has upon the resulting quality of these audio signals. For example, the techniques may determine a level of wind and/or other noise in an environment and may determine how best to process the signals to lessen the impact of the noise, such that one or more users that hear audio based on output of the signals hear higher-quality audio.

公开(公告)号：US10650840B1

公开(公告)日：2020-05-12

申请号：US16032494

申请日：2018-07-11

Applicant: Amazon Technologies, Inc.

Inventor： Ludger Solbach

IPC: G10L21/02 ,  G10L21/0264 ,  G10L21/0224 ,  G10L21/0216 ,  G10L21/0208

Abstract: A device that determines an echo latency estimate by subsampling reference audio data. The device may determine the echo latency corresponding to an amount of time between sending reference audio data to loudspeaker(s) and microphone audio data corresponding to the reference audio data being received. The device may generate subsampled reference audio data by selecting only portions of the reference audio data that have a magnitude above a desired percentile. For example, the device may compare a magnitude of an individual reference audio sample to a percentile estimate value and sample only the reference audio samples that exceed the percentile estimate value. The device generate cross-correlation data between the subsampled reference audio data and the microphone audio data and may estimate the echo latency based on an earliest significant peak represented in the cross-correlation data.

公开(公告)号：US20200100018A1

公开(公告)日：2020-03-26

申请号：US16686786

申请日：2019-11-18

Applicant: Amazon Technologies, Inc.

Inventor： Ludger Solbach

IPC: H04R1/10 ,  G10L21/0232 ,  H04R3/00 ,  G06F3/16 ,  H04R1/40

Abstract: A beamformer system includes an in-ear audio device, such as an earbud, that has three microphones. Two microphones may be disposed on an external face of the audio-device; one microphone may be disposed in or near the ear canal of a user. Data from two microphones is phase-adjusted and combined; a reference signal is generated by phase-adjusting and removing data from the two microphones from data from a third microphone. The combined data is filtered using the reference signal to remove any residual echo, and the resulting data may be used for communications, speech processing, or other uses.