Moving average.

I have a sound signal that I nee to create smoothening with a 3 ms window this is like a moving average. the sampling rate is 44.1/msec. How can I do this?

Answer 1

[Wayne King]

That would be a 132 point moving average filter, which you can do with

   b = 1/132*ones(132,1);
   output = filter(b,1,input);

[Sonia Wiemann]

Thanks!

[Image Analyst]

I agree, in fact that's why I suggested it in your earlier, duplicate posting (that I guess you forgot to check). http://www.mathworks.com/matlabcentral/answers/35683-smoothen-sound-signal