Download Answer the following questions based on the

Answer questions 1-6 separately for the following two sets of thresholds. Assume that all thresholds are
unmasked and measured using TDH-49 headphones.
SET A
250 Hz
45
AC
Right
AC Left 15
5
BC
Forehead
500 Hz
50
1000 Hz
55
2000 Hz
55
4000 Hz
60
8000 Hz
65
10
5
10
0
10
10
5
5
10
250 Hz
50
500 Hz
55
1000 Hz
65
2000 Hz
70
4000 Hz
70
8000 Hz
75
35
45
55
55
60
70
20
25
30
35
40
35
40
45
45
50
SET B
AC
Right
AC Left
BC
Right
Mastoid
BC Left
Mastoid
1. What is the type of hearing in the left ear?
a. Normal
b. Conductive
c. Mixed
d. Sensorineural
2. What is the degree of hearing loss in the left ear based on the three-frequency PTA?
a. Slight
b. Moderate
c. Moderately-Severe
d. None of the above/Not applicable
3. What is the type of hearing in the right ear?
a. Normal
b. Conductive
c. Mixed
d. Sensorineural
4. What is the degree of hearing loss in the right ear based on the three-frequency PTA?
a. Mild
b. Moderate
c. Moderately-Severe
d. Profound
5. Which of the following BC thresholds will have to be rechecked with masking because cross-hearing is
suspected?
a. Left ear
b. Right ear
c. Both
d. Neither
6. Based on these unmasked thresholds, which of the following AC thresholds will have to be rechecked
with masking because cross-hearing is suspected?
a. Left ear
b. Right ear
c. Both
d. Neither
7. For SET A, If you do suspect cross-hearing, which ear do you think is ‘helping’ the other? **
a. Right helping the left
b. Left helping the right
8. When measuring masked right ear thresholds, the test and non-test ears are the __________ ear and
__________ ear, respectively.
a. Right, Left
b. Left, Right
9. Which of the following arrangements would be appropriate when measuring masked right ear thresholds?
a. Tone in the right ear, noise in the left
b. Tone in the left ear, noise in the right
c. Tone in both ears
d. Noise in both ears
ANSWERS
Question
SET A
SET B
1
a
d
2
d (Since hearing is normal)
B (The 3-frequency PTA is 51.67 dB)
3
b
c
4
b (The 3-frequency PTA is 53.3 dB)
c (The 3-frequency PTA is 63.3 dB)
5
b (Since ABG > 10)
b
6
b (Using the formula ACTE – 40 ≥ BCNTE)
d
7. b (The left ear is the better ear. Therefore, it is probably participating in the responses of the right
ear)
8. a
9. a