公开(公告)号：US11785406B2

公开(公告)日：2023-10-10

申请号：US17155145

申请日：2021-01-22

Applicant: Amazon Technologies, Inc.

Inventor： Savaskan Bulek ,  Tarun Pruthi ,  Ali Abdollahzadeh Milani ,  Trausti Thor Kristjansson

IPC: H04R29/00 ,  G10L19/008 ,  H04R3/00 ,  H04M1/68

CPC classification number: H04R29/005 ,  G10L19/008 ,  H04R3/005 ,  H04R29/002 ,  H04M1/68

Abstract: A system configured to detect a tap event on a surface of a device only using microphone audio data. For example, instead of using a physical sensor to detect the tap event, the device may detect a tap event in proximity to a microphone based on a power level difference between two or more microphones. When a power ratio exceeds a threshold, the device may detect a tap event and perform an action. For example, the device may output an alarm and use a detected tap event as an input to delay or end the alarm. In some examples, the device may detect a tap event using a plurality of microphones. Additionally or alternatively, the device may distinguish between multiple tap events based on a location of the tap event, enabling the device to perform two separate actions depending on the location.

公开(公告)号：US11727926B1

公开(公告)日：2023-08-15

申请号：US17025376

申请日：2020-09-18

Applicant: Amazon Technologies, Inc.

Inventor： Yuzhou Liu ,  Savaskan Bulek ,  Ali Abdollahzadeh Milani ,  Tarun Pruthi ,  Trausti Thor Kristjansson

IPC: G10L15/20 ,  G10L15/22 ,  G10L15/16 ,  G10L25/84 ,  G10L25/90 ,  G10L21/0232 ,  G06N3/044 ,  G06N3/045

CPC classification number: G10L15/20 ,  G06N3/044 ,  G06N3/045 ,  G10L15/16 ,  G10L15/22 ,  G10L21/0232 ,  G10L25/84 ,  G10L25/90

Abstract: A computing device may receive audio data from a microphone representing audio in an environment of the device, which may correspond to an utterance and noise. A model may be trained to process the audio data to reduce noise from the audio data. The model may include an encoder that includes one or more dense layers, one or more recurrent layers, and a decoder that includes one or more dense layers.

公开(公告)号：US12072413B1

公开(公告)日：2024-08-27

申请号：US17218274

申请日：2021-03-31

Applicant: Amazon Technologies, Inc.

Inventor： Spencer Russell ,  Krishna Kamath Koteshwara ,  Tarun Pruthi ,  Ali Abdollahzadeh Milani ,  Trausti Thor Kristjansson ,  Anran Wang

IPC: H04R3/04 ,  G01N29/46 ,  G01N29/48 ,  G01S15/02 ,  G01S15/10

CPC classification number: G01S15/101 ,  G01N29/46 ,  G01N29/48 ,  H04R3/04 ,  H04R2430/23

Abstract: A system that performs wall detection and localization to determine a position of a device relative to acoustically reflective surfaces. The device emits an audible sound including a frequency modulated signal and captures reflections of the audible sound. The frequency modulated signal enables the device to determine an amplitude of the reflections at different time-of-arrivals, which corresponds to a direction of the reflection. The device then performs beamforming to generate a 2D intensity map that represents an intensity of the reflections at each spatial location around the device. The device detects wall(s) in proximity to the device by identifying peak intensities represented in the 2D intensity map. In some examples, instead of performing beamforming, the device can perform directional wall detection by physically rotating the device and emitting the audible sound in multiple directions. The device may perform ultrasonic wall detection using ultrasonic sound frequencies.