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like saying stop
if it's too loud,
or which one is
louder or softer,
can you repeat words
after me, and so on.
And they use all of that
input to create a new map.
PROFESSOR: Interesting.
So apparently with
cochlear implant users,
the frequency mapping
of the electrodes
doesn't change in a big way.
But in the auditory
brain stem implant,
they go through yearly checkups
and, evidently, the mapping
can change a great deal.
So it's completely different.
In cochlear implants, usually
the most apical electrode
evokes the lowest
sensation of pitch
and more basal electrodes get
higher and higher sensations
of pitch.
AUDIENCE: How easy is it
for you to differentiate
between two voices?
Like if you didn't see who was
talking and if I said something
and then Professor
[? Brown ?] said something,
how different would our
voices sound to you?
SHEILA: His voice is deeper,
and you're farther away from me.
So I think I can tell the
difference between you two.
I can tell difference between
male and female voices.
PROFESSOR: Right.
Female voices sound
higher usually.
SHEILA: Higher pictched.
Yeah.
PROFESSOR: Do you
know Mandarin Chinese?
SHEILA: Yeah, a little bit.
I can speak some
Chinese, but not
so good because I haven't
used Chinese for a long time.
PROFESSOR: It's a
tonal language, right?
SHEILA: Yeah.
Oh my God!
PROFESSOR: Does that give you--
SHEILA: It's like I went
to China 4 years ago.
I stayed in China