EAR

Question 1

indicative of the intensity level at which a listener can barely discern the presence of a speech 50% of the time

Answer 1

SPEECH DETECTION THRESHOLD (SDT)

[] coincides with the Pure Tone Average

Question 2

represents the intensity level at which a listener can repeat 50% of the speech material

Answer 2

SPEECH RECEPTION THRESHOLD (SRT)

[] 8-9 Dan higher than SDT

Question 3

Presented 50dB higher than SRT

Answer 3

Speech Discrimination Threshold

[] conductive HL: good speech discrimination

Question 4

Define crossover

Answer 4

When a sufficiently loud signal travels from the poor test ear to the non test ear

Question 5

Define interaural attenuation.

Answer 5

It is the reduction of sound when it crosses one ear from another

Question 6

Describe the various Tympanogram types.

Answer 6

Type A: normal pressure peak
Type As: low amplitude, ossicular chain fixation
Type Ad: high amplitude, hypermobile TM, ossicular chain discontinuity
Type B: flat, SOL, effusion, TM perforation
Type C: negative peak pressure, ET dysfunction
Type D: notched peak, hypermobile

Question 7

Gradenigo Syndrome Triad

[complication of Otitis media affecting the petrous apex]

Answer 7

Suppurative otitis media
Retroorbital pain (trigeminal nerve affected)
Abducens nerve Palsy