Matlab envelope function help
8 views (last 30 days)
Show older comments
Good day, my goal is to use the envelope() function to take sound signals and plot it's outskurts, so only it's amplitudes. Given an array of all the amplitudes of this sound signal, i was told I could use the envelope() function to create a new array plotting the outskirts of the signal making it easier to find words spoken in the sound wave. I'm unsure how to do this and am struggling to understand how the function works. If possible could I please get examples on how the function works (explain it as if I'm a dummy, cause at this point I think I am). Thanks a lot in advance!
0 Comments
Accepted Answer
John D'Errico
on 5 Sep 2021
Edited: John D'Errico
on 5 Sep 2021
Seems pretty easy. Read the help, and look at the examples. Envelope is part of the signal processing toolbox.
t = linspace(0,5*pi,300);
sig = 2*sin(t) + sin(3*t) + randn(size(t))/50; % some noise for fun
[hi,lo] = envelope(sig);
plot(t,sig,'r-',t,hi,'g-',t,lo,'b-')
legend('Signal','upper','lower')
grid on
It can probably do better if I spend some time reading the help, but that is your job. I don't even have that toolbox.
0 Comments
More Answers (0)
See Also
Categories
Find more on Line Plots in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!