Inventor
CHHETRI AMIT SINGH
US37 patents
⚠️ This page may combine multiple inventors who share the name “CHHETRI AMIT SINGH”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AMAZON TECH INC
36 patentsUS9754605B1Sep 5, 2017
Step-size control for multi-channel acoustic echo canceller
AMAZON TECH INC206 citations99
US10304475B1May 28, 2019
Trigger word based beam selection
AMAZON TECH INC161 citations98
US9689960B1Jun 27, 2017
Beam rejection in multi-beam microphone systems
AMAZON TECH INC181 citations98
US9591404B1Mar 7, 2017
Beamformer design using constrained convex optimization in three-dimensional space
AMAZON TECH INC76 citations98
US10863270B1Dec 8, 2020
Beamforming for a wearable computer
AMAZON TECH INC38 citations97
US10746840B1Aug 18, 2020
Beam rejection in multi-beam microphone systems
AMAZON TECH INC57 citations97
US9704478B1Jul 11, 2017
Audio output masking for improved automatic speech recognition
AMAZON TECH INC201 citations97
US9432768B1Aug 30, 2016
Beam forming for a wearable computer
AMAZON TECH INC46 citations97
US9820036B1Nov 14, 2017
Speech processing of reflected sound
AMAZON TECH INC202 citations96
US9973849B1May 15, 2018
Signal quality beam selection
AMAZON TECH INC185 citations95
US11646009B1May 9, 2023
Autonomously motile device with noise suppression
AMAZON TECH INC27 citations94
US11218802B1Jan 4, 2022
Beamformer rotation
AMAZON TECH INC24 citations94
US10229698B1Mar 12, 2019
Playback reference signal-assisted multi-microphone interference canceler
AMAZON TECH INC49 citations94
US10147439B1Dec 4, 2018
Volume adjustment for listening environment
AMAZON TECH INC55 citations94
US9432769B1Aug 30, 2016
Method and system for beam selection in microphone array beamformers
AMAZON TECH INC42 citations94
US10452116B1Oct 22, 2019
Determining a device state based on user presence detection
AMAZON TECH INC30 citations93
US9678559B1Jun 13, 2017
Determining a device state based on user presence detection
AMAZON TECH INC45 citations93
US9734845B1Aug 15, 2017
Mitigating effects of electronic audio sources in expression detection
AMAZON TECH INC51 citations92
US11854564B1Dec 26, 2023
Autonomously motile device with noise suppression
AMAZON TECH INC16 citations85
US11521635B1Dec 6, 2022
Systems and methods for noise cancellation
AMAZON TECH INC16 citations85
US11425494B1Aug 23, 2022
Autonomously motile device with adaptive beamforming
AMAZON TECH INC7 citations85
US9978387B1May 22, 2018
Reference signal generation for acoustic echo cancellation
AMAZON TECH INC8 citations84
US9473646B1Oct 18, 2016
Robust acoustic echo cancellation
AMAZON TECH INC8 citations84
US8953777B1Feb 10, 2015
Echo path change detector with robustness to double talk
AMAZON TECH INC11 citations84
US10244313B1Mar 26, 2019
Beamforming for a wearable computer
AMAZON TECH INC7 citations83
US9390723B1Jul 12, 2016
Efficient dereverberation in networked audio systems
AMAZON TECH INC11 citations82
US8983057B1Mar 17, 2015
Step size control for acoustic echo cancellation
AMAZON TECH INC10 citations82
US10237647B1Mar 19, 2019
Adaptive step-size control for beamformer
AMAZON TECH INC6 citations73
US9837099B1Dec 5, 2017
Method and system for beam selection in microphone array beamformers
AMAZON TECH INC4 citations73
US9521249B1Dec 13, 2016
Echo path change detector with robustness to double talk
AMAZON TECH INC3 citations73
US12272369B1Apr 8, 2025
Dereverberation and noise reduction
AMAZON TECH INC6 citations72
US11175372B1Nov 16, 2021
Beam rejection in multi-beam microphone systems
AMAZON TECH INC1 citations72
US11624800B1Apr 11, 2023
Beam rejection in multi-beam microphone systems
AMAZON TECH INC0 citations62
US11258478B1Feb 22, 2022
Autonomously motile device with residual echo suppression
AMAZON TECH INC0 citations51
US12531046B1Jan 20, 2026
Noise reduction and residual echo suppression
AMAZON TECH INC0 citations50
US12455372B1Oct 28, 2025
Presence detection based on multiple sensors
AMAZON TECH INC0 citations47