[Julieta]

I think this is because when you select a window in Praat, it doesn’t ONLY select your window, but a bit before and after.
In the videos, it is mentioned that selecting windows with. rectangular ‘edges’ creates sharp changes at beginning and end of your selection, which are artefacts (not in the real wave).
So by default Praat will make your window ‘tapered’ and overlapping (in the shape of a gaussian curve, as per documentation mentioned in lecture) to smooth out these artefacts.

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