Lecture 23: Auditory perception 2

Question 1

Hair cells sit in rows on the

Answer 1

basilar membrane

Question 2

We have approximately _______ inner

hair cells and ______ outer hair cells

Answer 2

3,500; 20,000

Question 3

Difference between inner (1) and outer (3) hair cells?

Answer 3

Outer: moves tectorial membrane to trigger inner hair cells
1 column of inner hair cells

Inner: 95% go up auditory nerve to the brain (5% outer)
3 column of inner hair cells

Question 4

the change from physical

energy to electrochemical energy

Answer 4

transduction

Question 5

The moving roof triggers _________ to send signals along the ____________.

Answer 5

inner hair cells; auditory nerve

Question 6

What is the place code?

Answer 6

Frequency localised on how close to the base of basilar membrane

Question 7

When does place code theory hold up?

Answer 7

High frequencies above 800Hz.

Question 8

What is phase locking?

Answer 8

Spikes the same time as peaks of frequencies

Question 9

Auditory nerve connected to inner hair cell tends to fire

at the __________ of the stimulating waveform.

Answer 9

same phase

Question 10

When does phase locking theory hold up?

Answer 10

Low frequencies below 1-2kHz