Um  If you  have somebody who has some experience with this sort of thing , and they work on it for a couple months ,  they can come up with something that gets most of the cases fairly easily. Then you say , " OK , I don't just wanna get most of the cases I want it to be really accurate. " Then it gets really hard no matter what you do. So , the p the problem is is that if you say , " Well I  I have these other data over here ,  that I learn things from , either explicit training of neural nets or of Gaussian mixture models or whatever. "
Yeah.
Uh  Suppose you don't use any of those things. You say you have looked for acoustic change. Well , what does that mean ? That  that means you set some thresholds somewhere or something ,
Yeah.