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PASSIVE PROXIMITY DETECTION

  • US 20120263019A1
  • Filed: 04/18/2011
  • Published: 10/18/2012
  • Est. Priority Date: 04/18/2011
  • Status: Active Grant
First Claim
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1. A method of passive proximity detection comprising:

  • sensing a first sound wave using a first audio transducer and generating a first signal representative of the first sound wave;

    sensing a second sound wave and generating a second signal; and

    comparing characteristics of the first and second signal using a processor to determine if differences between the first and second signals indicate the first audio transducer is proximately located to another object.

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