Integral Of Audio Signal
11 views (last 30 days)
Show older comments
Hello everyone, I take my sound from microphone and my main purpose is calculating the Fourier Coefficients of it and coverge it.
But I need to calculate the integral of my audio signal because I need to calculate the coefficients. I tried xtrapz(x,y) and int functions but they don't meet my requirements. How can I calculate the integral of my sound? Thanks.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Error using trapz (line 15)
LENGTH(X) must equal the length of Y in dim 1.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Undefined function 'int' for input arguments of type 'double'.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Also I need some suggestions about the calculating coefficients, thanks.
My code:
recorder= audiorecorder(16000,8,2);
disp('please record your voice');
drawnow();
pause(1);
recordblocking(recorder, 5);
play(recorder);
data=getaudiodata(recorder);
x=0.2:pi/1000:2.2;
trapz(x,data)
0 Comments
Answers (1)
Walter Roberson
on 7 Nov 2020
Edited: Walter Roberson
on 7 Nov 2020
Fs = 16000;
trapz(data)/Fs
But if you need the fourier coefficients then just fft(data)
4 Comments
Walter Roberson
on 7 Nov 2020
audiorecoder(16000,8,2) means to record with a sampling frequency of 16000 Hz, 8 bits per channel, 2 channels. You are getting two results because you are getting a result for each channel.
If you are calculating the coefficients for discrete fourier transform (fft) then you should not be integrating the signal, and you should be summing the signal instead, sum(data)
See Also
Categories
Find more on Measurements and Spatial Audio in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!