Intensity of signal in matbal

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MatLab

how can i calculate the intensity of signal with matlab?

What I have tried:

i want to implement this article

Posted 5-Mar-16 19:50pm

iman DA

Updated 6-Mar-16 0:38am

OriginalGriff

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iman DA 6-Mar-16 6:37am

Dear Kenneth Haugland
First of all thanks for your guidance and support of me on my difficulty. According to what you told me on previous comment I want to know how I can use it, I mean how I can implant and lunch what you wrote. Moreover do you have any suggestion for me to learn it better I mean website, article and so on.for more I want to calculate the perceptual entropy.

Kenneth Haugland 6-Mar-16 6:46am

That is too big a question to answer, you are not stuck at a point trying to do it, you want the whole book about it. I cant do that, so my answer is the best you'll get at this point.

iman DA 6-Mar-16 6:59am

As you mentioned this is so difficult to explain whole part of that. however, I wonder if you could introduce for me at least name of book, chapter or even website because I know you are professional on what I am in basic level I mean perceptual entropy on Matlab.

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Kenneth Haugland · Answer 1 · 2016-03-06T00:37:00

Don't have the article, but intensity in audio is defined as => 0.5 Re{p v*} where v* is the complex conjugate of the velocity and p is the pressure. This is called the active part of the intensity, you could take Im{} to get the reactive part as well but we normally don't care about that. As you see, in order to get the actual intensity, you need to get the calibrated values, not jus the wave file (or whatever format you have on the audio file).