Module 4

Question 1

Masking is an important tool to determine ear-specific thresholds in individuals with ____ hearing loss or in individuals with ____ hearing loss

a) air bone
b) conductive
c) asymmetric
d) A and B only
e) B and C only

Answer 1

e) B and C only

asymmetric hearing loss
conductive hearing loss

Question 2

When conducting pure tone testing, there are several situations in which the sound presented to the test ear can be heard in the non-test ear. This can occur when testing by bone conduction at any intensity or when testing by air conduction True or false

Answer 2

True –can occur with both air conduction and bone conduction

Question 3

To prevent the patient from responding to the signal that may be present in the non-test ear, we deliver a noise to the non-test ear via air conduction, while at the same time we present the pure tone to the test ear. This noise is called the _____.

Answer 3

masker

Question 4

The masker is always delivered via bone conduction. True or false.

Answer 4

False- it is delivered via AIR CONDUCTION.

Question 5

Why is the masker always delivered via air conduction?

Answer 5

because this would make it impossible to ever find the true threshold from the test ear

Question 6

When using noise in the non-test ear while obtaining thresholds in the test ear, this is called _____?

Answer 6

clinical masking

Question 7

When conducting pure tone testing, the type of masking noise that is used is called a ________?

Answer 7

narrow band maker.

Question 8

For our head, crossover is going to occur more often for low frequencies than for high frequencies. True or false?

Answer 8

true

Question 9

The amount of sound energy that is absorbed by the skull and not transmitted to the opposite cochlea is the amount of ________?

a) bone mass
b) air conduction
c) bone conduction air
d) interaural attenuation
e) crossover

Answer 9

d) interaural attenuation

Question 10

Supra-aural earphones have MORE interaural attenuation because they have a larger contact area with the skull, while insert earphones have LOWER interaural attenuation, because they make less contact with the skull. TRUE OR FALSE?

Answer 10

False!

Supre-aural earphones have LESS Interaural attenuation because there is MORE contact with the skull.

Insert earphones have LESS contact with the skull which means that will have a higher INTERAURAL ATTENUATION.

Question 11

The level of interaural attenuation for bone conduction transducer is 0.

a) 0
b) 40
c) 50
d) 55
e) 10

Answer 11

a)0

Question 12

The lowest level of interaural attenuation observed for supra-aural earphones is ?

a) 0
b) 40
c) 50
d) 55
e) 10

Answer 12

b) 40

Question 13

The lowest level of interaural attenuation observed for insert earphones is?

a) 0
b) 40
c) 50
d) 55
e) 10

Answer 13

d) 55 dB HL.

Question 14

______ is the amount of sound actually reaching the opposite ear.

a) cross hearing
b) crossover
c) aural crossing
d) bone crossing

Answer 14

b)crossover

Question 15

______ occurs when the patient’s bone conduction threshold of the non-test ear is lower than the amount of sound that is crossing over.

a) cross hearing
b) crossover
c) aural crossing
d) bone crossing

Answer 15

a) cross hearing

Question 16

Formulas:
Test ear - Interaural attenuation= crossover

Test ear-Interaural attenuation- bone conduction in non-test ear= cross hearing

Answer 16

=D

Question 17

How many dB of sound could be reaching the non-test ear if a 75 dB HL sound is presented to the test ear using insert earphones?

a) 10
b) 30
c) 20
d) 45

Answer 17

c)20 db HL

Question 18

This is the calibrated amount of noise that will provide a threshold shift to the masker’s corresponding pure tone

a) effective masking
b) masking
c) cross masking
d) crossover masking

Answer 18

effective masking