Audiometry Flashcards
1
Q
What is the range of normal hearing?
A
-10dB -> 20 dB
2
Q
What is bone conduction?
A
bypasses the inner ear and goes straight to the cornea
3
Q
How does sensorineural hearing loss appear on audiometry?
A
NO GAP between air and bone conduction
4
Q
What can SNHL be due to?
A
rubella otoxic drugs tumours of nerves complications at birth prolonged loud noise exposure
5
Q
What is SNHL?
A
damage of the hair cells or auditory nerve or both
6
Q
How does conductive hearing loss appear on audiometry?
A
GAP between bone and air conduction
7
Q
How can CHL be corrected?
A
surgery
8
Q
What can CHL be due to?
A
glue ear
effusions
perforated ear drums
9
Q
What is the role of tympanometry?
A
tests the condition of the middle ear - creates variations of pressure in the canal
10
Q
What can tympanometry diagnosed?
A
Otitis medial
perforated tempanic membrane
