Audiology Exam 2

What is an example of a behavioral measure?

Audiogram; because the patient must respond

What is an example of an objective measure and why?

OAEs, tympanogram, ABR; because there is no response needed from the patient

Why do we conduct objective measures?

to target specific anatomical features, useful for individuals who are unable to perform behavioral stats

What part of the ear anatomy does tympanometry assess?

middle ear

What visual tool do we use to represent the results of tympanometry?

tympanogram

What tympanogram would you see with an individual with normal ME pressure?

Type A

What tympanogram would you see with an individual with an obstructed Eustachian tube?

Type C

What tympanogram would you see with an individual with fluid in the ME?

Type B

What is one possible cause of an abnormally large ECV?

TM perforation

Otoacoustic emissions measures the movement of what?

Outer hair cells

OAEs are generated by the movement of what?

fluid in the cochlea

What do OAEs create?

a traveling wave that traves back through the ME and ear canal

A patient with what kind of hearing loss will have absent OAEs (no response)?

conductive, sensorineural, or hearing loss GREATER than moderate

What range do we measure OAE’s?

1000 Hz - 4000 Hz

What does the Auditory Brainstem Response measure?

the path of electrical potentials from the cochlea to the cortex, like an EEG

How long should a normal latency for a wave V on an ABR be?

~ 5 ms

What would a patient have if they have present OAEs but absent ABR?

acoustic neuroma

What are two tests that are conducted in newborn hearing screenings?

OAEs and ABRs

What do hearing aids do?

amplify sounds at a specific increments at specific frequencies

list 3 different hearing aid styles

1. behind-the-ear (BTE)

2. in-the-ear (ITE)

3. completely-in-canal (CIC)

Label the parts of the hearing aids and list their functions:

a. speaker (receiver) - send sound to ear

b. volume control

c. battery - powers hearing aid

d. microphone - picks up sound

e. amplifier - amplifies sound signals

Describe the process of sound transmission in a hearing aid:

sound enters microphone → sound amplified by amplifier → sent to receiver → sounds delivered to ear

Describe what a hearing aid fitting/verification looks like:

enter patient’s audiogram onto the hearing aid software → program HA settings/programs → conducts real ear measurements (REM) to verify amplification → adjust based on patient feedback

Measuring the output of a hearing aid while the patient is wearing it is referred to as what?

Real Ear Measuements (REM)