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Detecting device proximities

  • US 10,062,372 B1
  • Filed: 05/09/2016
  • Issued: 08/28/2018
  • Est. Priority Date: 03/28/2014
  • Status: Active Grant
First Claim
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1. A first device comprising:

  • a microphone configured to produce a first audio signal at least partly representing output audio produced by a speaker of a second device, wherein the first device is positioned at a distance from the second device;

    an adaptive finite impulse response (FIR) filter configured to;

    obtain a second audio signal used by the second device to generate the output audio; and

    remove, using the second audio signal, at least a portion of the first audio signal to generate a third audio signal; and

    a detector configured to send, based at least in part on a first sequence of filter coefficients associated with the adaptive FIR filter, a notification that at least one of the first device or the second device is to be moved to increase the distance.

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