ENT: Hearing Loss and Audiology

Question 0

What is the most important mechanism in the amplification of sound transmission thru the ear.

Answer 0

Hydraulic Ratio: the area of the TM to the area of the oval window creates a gain of 21:1 in sound energy.

Question 1

Most common cranial nerve affected by middle ear infections.

Answer 1

CN VII

Question 2

What is the main goal in surgical correction of conductive hearing loss?

Answer 2

Creation of a large and mobile tympanic membrane.

Question 3

What is the function of the semicircular canals and the utricle and saccule?

Answer 3

Semicircular Canals: detect angular acceleration of the body

Utricle and Saccule: detect body position using gravity

Question 4

What is presbycusis?

Answer 4

Age related high frequency sensineuronal hearing loss.

Question 5

What is the frequency of maximal hearing loss in noise induced sensineuronal hearing loss?

Answer 5

4000Hz

Question 6

What is the Auditory Brainstem Response?

Answer 6

An objective test that assesses the function of CN VIII. This test works on patients that are comatose, neonates, or unwilling to cooperate.

Question 7

What is the earliest age that hearing aids can be used for hearing loss treatment?

Answer 7

6 months