Yes, I do it. I sometimes repeat words that I heard from TV a couple times or I "speak" (?) just some letters very fast, like "ta-ta-ta-ta..." or others. But not very loud, more like whispering.
_________________
English is not my native language, so I will very likely do mistakes in writing or understanding. My edits are due to corrections of mistakes, which I sometimes recognize just after submitting a text.