Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ramya Gopalan0
Amit Singh Chhetri0
Kavitha Velusamy0
Kenneth Edgar Hild, II0
William Folwell Barton0
Date of Patent
June 27, 2017
Patent Application Number
13857040
Date Filed
April 4, 2013
Patent Citations Received
...
Patent Primary Examiner
Patent abstract
The systems, devices, and processes described herein may identify a beam of a voice-controlled device that is directed toward a reflective surface, such as a wall. The beams may be created by a beamformer. An acoustic echo canceller (AEC) may create filter coefficients for a reference sound. The filter coefficients may be analyzed to identify beams that include multiple peaks. The multiple peaks may indicate presence of one or more reflective surfaces. Using the amplitude and the time delay between the peaks, the device may determine that it is close to a reflective surface in a direction of the beam.
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