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Audio testing system and method

  • US 9,204,234 B2
  • Filed: 07/16/2012
  • Issued: 12/01/2015
  • Est. Priority Date: 06/19/2008
  • Status: Expired due to Fees
First Claim
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1. An audio testing method for testing an audio signal, the method comprising:

  • providing a computer system having a sound card connected to an audio-emitting device;

    receiving an audio signal from the audio-emitting device;

    sampling the audio signal for obtaining sampling points;

    storing the sampling points in a memory system of the computer system, wherein the sampling points are divided into a plurality of groups, the sampling points sampled in each continuous P milliseconds (ms) form one of the groups of sampling points, and P ranges between 3 and 10 ms;

    processing each group of sampling points stored in the memory;

    taking differences between amplitude values of each two adjacent sampling points via subtraction;

    taking the absolute values of all the differences and adding up all of the absolute values;

    determining if the sampling points has been processed for Q times, wherein Q ranges between 5-10;

    taking maximum values and minimum values from the summations, namely Max and Min upon the condition that the computer system has processed sampling points for Q times;

    processing the sampling points stored in the memory into P number of sampling regions again upon the condition that the computer system has not processed sampling points for Q times;

    determining if the Max/Min is equal to S, wherein S may range between 20-30;

    determining that the audio signal has been distorted upon the condition that the Max/Min is equal to or more than S; and

    determining that the audio signal has been not distorted upon the condition that the Max/Min is less than S.

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