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Apparatus and method for recognizing horn using sound signal processor

  • US 9,615,186 B2
  • Filed: 12/13/2014
  • Issued: 04/04/2017
  • Est. Priority Date: 10/15/2014
  • Status: Active Grant
First Claim
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1. An apparatus for recognizing a horn using a sound signal process, comprising:

  • a memory configured to store program instructions;

    a sound signal processor configured to execute program instructions, the program instructions when executed configured to;

    acquire and store surrounding sound data from a microphone;

    sample a sound signal within the sound data;

    perform signal conversion on frequencies of the sampled sound signal;

    define and extract frequency signals that exhibit horn sound characteristics from the converted frequency signals;

    combine the extracted frequency signals;

    accumulate the combined frequency signals over time;

    calculate a change of the accumulated frequency signals; and

    determine whether the calculated change of the frequency signals is equal to or greater than a threshold value to determine whether and when the horn is generated.

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