Patent ID: 9204234
Filing Date: 2015-12-01
Classification: H04R

Abstract:
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.