function or algorithm to analyse signal content

Question

Elinor Ginzburg 2020-9-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/593944-function-or-algorithm-to-analyse-signal-content

回答： Xavier 2020-9-15

采纳的回答： Xavier

在 MATLAB Online 中打开

Hello,

I'm trying to classify an audio signal I have by the following table which is taken from page 15 in this article

I'm not sure how to do it using matlab. perhaps anyone could refer me to some useful functions? the code I've tried is this one which plots the signal content in time domain:

    % get input paths
    input = importdata('paths\input_p1.txt');
    % create audio object for the algorithm
    [signal, fs] = audioread(char(input(index)));
    
   
    f0 = figure;
    t = 0:1/fs:1-1/fs;
    signal = resample(signal,1,90)';
    plot(t, signal);
    title('Signal Content');

And I got something that looks like `Narrowband random signal` ad shown below

but I wasn't sure I've understood it correctly, so i'de appreciate if anyone could explain to me how exactly can I plot the signal content using matlab.

Thank you