Comparing the temporal evolution of two signals

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L T
L T 2012-2-25
Hello everybody, I need to find a way to compare the difference between the temporal evolution of two acoustic signals.
For the moment I don't want to focus on the spectrum but on the envelope. So basically I would like to have a measure indicating how much the envelope profile of two signals differs. Would it be a good idea to extract the envelope of the two signals and comparing it?

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