Ye - Well that 's the variance , but if you just say " what is  " I mean , to first order , um yeah one of the differences between voiced , unvoiced and silence is energy. Another one is  but the other one is the spectral shape.
Yeah , I I 'll  The spectral shape ,
Yeah , and so R - one over R - zero is what you typically use for that.
yeah. No , I don't use that  I can't use