ABA Audiologic Assessment & Diagnosis 2

Question 1

Which tympanometric peak pressure value is most consistent with Eustachian tube dysfunction?

Accepted Answer

-200 daPa

Answer

Negative middle ear pressure more negative than -150 daPa suggests Eustachian tube dysfunction impairing pressure equalization.

Question 2

A patient shows absent acoustic reflexes bilaterally at all frequencies with normal tympanograms. The most likely site of lesion is:

Accepted Answer

Auditory nerve or brainstem

Answer

Absent acoustic reflexes with normal tympanograms and middle ear function point to retrocochlear pathology at the auditory nerve or brainstem level.

Question 3

The carhart notch on bone conduction audiometry is a mechanical artifact characteristically seen at which frequency?

Accepted Answer

2000 Hz

Answer

The Carhart notch is a 2000 Hz bone conduction dip caused by the resonant frequency of the ossicular chain being disrupted in otosclerosis.

Question 4

Which ABR wave is generated by the cochlear nucleus?

Accepted Answer

Wave III

Answer

Wave III of the ABR is generated by the cochlear nucleus (CN) in the brainstem.

Question 5

In otoacoustic emission testing, which type of OAE is elicited by presenting two simultaneous pure tones (f1 and f2)?

Accepted Answer

Distortion product OAE (DPOAE)

Answer

DPOAEs are generated by the nonlinear interaction of two simultaneous primary tones (f1 and f2) in the cochlea.

(ABA) American Board of Audiology Practice Test