No, but I find it interesting if this is a technique used by quite a few. Personally, I think whispering in a situation where there is no reason to be extra quiet would bother me and I would find it really odd, not soothing at all. But I don't like when people, in general, use tone of voice that is different from normal adult speech. One of my Ts once tried to talk to me in a way that sounded like talking to a child - I got quite annoyed and made a sarcastic comment making fun of him. He never tried that again. I do prefer speech that generally has a calm, even tone though.