Hearing Aid Dispenser Written Exam questions with
verified answers
% difference in monaural WR scores that require a medical referral Ans✓✓✓ 20%
1/2 gain rule Ans✓✓✓ divide the srt by 2 and add 10 db for reserve. ex: srt=40 ;
40/2 = 20 + 10 = 30. Prescribed gain would be 30 db
ABLB test is used for: Ans✓✓✓ used clinically to determine whether loudness
recruitment is present in the abnormal ear in a patient with unilateral hearing
loss. behavioral test
ABR test purpose and definition Ans✓✓✓ adults. The Auditory Brainstem
Response or ABR is a neurological test; it's similar to an EEG. To complete the test,
the doctor will play sounds (click bursts) into the ears through headphones and
then measure responses from the ear, hearing-nerve and brain with electrodes
placed on the forehead and behind the ears.
absorption Ans✓✓✓ aborbs sound. can improve environments w/ reflection or
reverb. better in warmth and moist
acoustic neuroma Ans✓✓✓ tumor on auditory nerve. can be life-threatening.
symptoms: large, unexpected AN asymmetries, WR poorer than expected, recent
onset of unilateral tinnitus, dizziness.
acoustic reflex Ans✓✓✓ tensor tympani (muscle on malleus) and the stapedius
muscle contract to prevent damaging intensities of loud sounds
,adaptive directionality Ans✓✓✓ environmental classifier will change the polar
plot to best pick up the speech signals it detects. adapts to its environment and
changes polar pattern appropriately
advantage of testing the bone conduction threshold at the forehead Ans✓✓✓
improve test reliability
agreement between pta and srt Ans✓✓✓ plus or minus 10db
annular ligament Ans✓✓✓ footplate of stapes that is held in the oval window
anotia Ans✓✓✓ absence of one or both external ears
aperture Ans✓✓✓ entrance to canal, first bend
apex of cochlea respond to: Ans✓✓✓ low freq sounds
atresia Ans✓✓✓ absense of an ear canal
auditory neuropathy Ans✓✓✓ distorted speech. aud deprivation
automatic directionality Ans✓✓✓ HA doesnt need to be manually adjusted. The
environmental classifier determines when it is directional or omnidirectional
automatically
, automatic gain control definition Ans✓✓✓ control the sound intensity associated
w/ feedback circuit
autophony Ans✓✓✓ or tympanophony is the unusually loud hearing of a
person's own voice. possible cause: the occlusion effect
average dimentions of an adult eardrum Ans✓✓✓ 2.3-2.9cm in length, .7cm in
diameters
barotrauma Ans✓✓✓ caused by sudden change in air pressure (eustachian tube
dysfunction). may result in fistula
base of cochlea respond to: Ans✓✓✓ high freq sounds
Benefits of a digital amplifier over analog Ans✓✓✓ less internal noise and
distortion, greater shaping flexibility, the ability to perform noise suppression and
feedback management
biggest concern when using dampers Ans✓✓✓ moisture build up
BILL circuit (ASP circuit) Ans✓✓✓ "bass increase at low levels", would provide
and increase in the low freq. when in quiet environment. In noise and loud
environment, reduce low freq. amplification
binaural degradation Ans✓✓✓ when the binaural WR score is lower than the
better ear WR score. medical referral required
verified answers
% difference in monaural WR scores that require a medical referral Ans✓✓✓ 20%
1/2 gain rule Ans✓✓✓ divide the srt by 2 and add 10 db for reserve. ex: srt=40 ;
40/2 = 20 + 10 = 30. Prescribed gain would be 30 db
ABLB test is used for: Ans✓✓✓ used clinically to determine whether loudness
recruitment is present in the abnormal ear in a patient with unilateral hearing
loss. behavioral test
ABR test purpose and definition Ans✓✓✓ adults. The Auditory Brainstem
Response or ABR is a neurological test; it's similar to an EEG. To complete the test,
the doctor will play sounds (click bursts) into the ears through headphones and
then measure responses from the ear, hearing-nerve and brain with electrodes
placed on the forehead and behind the ears.
absorption Ans✓✓✓ aborbs sound. can improve environments w/ reflection or
reverb. better in warmth and moist
acoustic neuroma Ans✓✓✓ tumor on auditory nerve. can be life-threatening.
symptoms: large, unexpected AN asymmetries, WR poorer than expected, recent
onset of unilateral tinnitus, dizziness.
acoustic reflex Ans✓✓✓ tensor tympani (muscle on malleus) and the stapedius
muscle contract to prevent damaging intensities of loud sounds
,adaptive directionality Ans✓✓✓ environmental classifier will change the polar
plot to best pick up the speech signals it detects. adapts to its environment and
changes polar pattern appropriately
advantage of testing the bone conduction threshold at the forehead Ans✓✓✓
improve test reliability
agreement between pta and srt Ans✓✓✓ plus or minus 10db
annular ligament Ans✓✓✓ footplate of stapes that is held in the oval window
anotia Ans✓✓✓ absence of one or both external ears
aperture Ans✓✓✓ entrance to canal, first bend
apex of cochlea respond to: Ans✓✓✓ low freq sounds
atresia Ans✓✓✓ absense of an ear canal
auditory neuropathy Ans✓✓✓ distorted speech. aud deprivation
automatic directionality Ans✓✓✓ HA doesnt need to be manually adjusted. The
environmental classifier determines when it is directional or omnidirectional
automatically
, automatic gain control definition Ans✓✓✓ control the sound intensity associated
w/ feedback circuit
autophony Ans✓✓✓ or tympanophony is the unusually loud hearing of a
person's own voice. possible cause: the occlusion effect
average dimentions of an adult eardrum Ans✓✓✓ 2.3-2.9cm in length, .7cm in
diameters
barotrauma Ans✓✓✓ caused by sudden change in air pressure (eustachian tube
dysfunction). may result in fistula
base of cochlea respond to: Ans✓✓✓ high freq sounds
Benefits of a digital amplifier over analog Ans✓✓✓ less internal noise and
distortion, greater shaping flexibility, the ability to perform noise suppression and
feedback management
biggest concern when using dampers Ans✓✓✓ moisture build up
BILL circuit (ASP circuit) Ans✓✓✓ "bass increase at low levels", would provide
and increase in the low freq. when in quiet environment. In noise and loud
environment, reduce low freq. amplification
binaural degradation Ans✓✓✓ when the binaural WR score is lower than the
better ear WR score. medical referral required
