[Paul C]

Also, in choosing the peak in such a plot, why do we need to find exactly one? If the value of tau is greater than a single pitch period, could it not be that multiple peaks in the plot correspond to multiple moments of maximal self-similarity (i.e. multiple pitch periods aligning)?

[Paul C]

I (cautiously!) understand from Wikipedia that “Sound pressure is the difference, in a given medium, between average local pressure and the pressure in the sound wave” – so can we understand the value from 0-1 as an expression of the ratio between these two things? What would it mean for a pulse to have negative energy? Doesn’t negative amplitude => no sound at all?

[Author]

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