A
Uh-huh.
B
they have, uh, they have a speech signal and what, and what is said.
A
Right.
B
And they have a, they're able to average it over a number of different occasions because peoples voices change a lot even from morning to evening and that's, uh, a big problem in speech recognition.
A
Oh, yes. I know they change with age, I know mine changes, uh, has changed, uh, although you, you never found, your, your voice echoes in your own head which is, makes it different than what it really sounds to other people.
B
Yeah.