Something that  that I 've used in the past is , um  when just looking at the energy , is to look at the derivative. And you  make your decision when the derivative is increasing for  so many frames. Then you say that 's beginning of speech.
Uh - huh.
But , I 'm  I 'm trying to remember if that requires that you keep some amount of speech in a buffer. I guess it depends on how you do it. But  I mean , that 's  that 's been a useful thing.
Yeah.