because , you know , there 's   if you have  more than five hundred milliseconds of  of  of nonspeech then you figure it 's end of utterance or something like that.
Mm - hmm.
So , um.
And it seems important for , like , the on - line normalization. Um. We don't want to update the mean and variance during silen long silence portions. Um. So it  it has to be done before