8. Auditory Perception Flashcards
1
Q
What is condensation?
A
Increase in pressure
2
Q
What is rarefaction?
A
Decreased pressure.
3
Q
What is the perception of frequency called?
A
Pitch
4
Q
What is the perception of air pressure called?
A
Loudness
5
Q
What is sound pressure measured in?
A
Decibals (dBs)
6
Q
What occurs in the inner-ear?
A
- Vibrations in air transmitted to vibrations in liquid inside cochlea.
- Sets the organs of corti into up and down motion
- Sets tactorial membrane into back and forth motion
- Outer hair cells move as they are in contact with tactorial membrane
- Inner hair cells move in relation to pressure waves.
7
Q
What motion does the tactorial membrane do?
A
Back and forth
8
Q
What motion does the organs of cotri do?
A
Up and down
9
Q
What motion does the organs of cotri do?
A
Up and down
10
Q
How does the movement of hair lead to electrical signalling?
A
- Movement of cilia to the right in the inner hair cell due to pressure waves causes tip links to stretch
- This can cause ion channels to open resulting in a potassium influx and depolarisation
- Side to side motion due to sound frequency causes alternating bursts of electrical signalling.
