Um. A sudden change or a relatively rapid change in some spectral characteristic will  will do sort of this. I mean , there 's certainly a bunch of  a bunch of places where you know that neurons are gonna fire because something novel has happened. That was  that was the main thing that we were focusing on there. But there 's certainly other things beyond what we talked about there that aren't just sort of rapid changes , but
It 's kinda like the difference between top - down and bottom - up.
Yeah.
I think of the acoustic  you know , phonetic features as being top - down. You know , you look at the phone and you say this phone is supposed to be  you know , have this feature , this feature , and this feature. Whether tha those features show up in the acoustic signal is sort of irrelevant. Whereas , an acoustic event goes the other way. Here 's the signal. Here 's some event.