T2 L14: Physiology of hearing

Question 1

What is frequency measured in?

Answer 1

Hz

Question 2

What is intensity of sound measured in?

Answer 2

dB

Question 3

Is it true that adults progressively lose high frequency hearing?

Answer 3

Yes

Question 4

Intensities over how many dB can cause permanent hearing damage?

Answer 4

> 90 dB

Question 5

What are the 3 bones that make up the middle ear?

Answer 5

Malleus, Incus, and stapes

Question 6

What is otitis media?

Answer 6

Infection or inflammation of the middle ear. If chronic, it can cause conductive hearing loss

Common in children from an upper airways tract infection because of the Eustachian tube that connects them

Question 7

What are grommets?

Answer 7

Tubes inserted into the ear drum that drain the ear to treat an infection

Question 8

What is otosclerosis?

Answer 8

A fusion of stapes with oval window which causes deafness

It can be reversed by replacing the stapes

Question 9

Which parts of the cochlea are tuned for which frequencies?

Answer 9

Basal- high frequency

Apical- low frequency