IHS EXASM QUESTIONS AND ANSWERS
100% GRADED A+
When the better ear "answers" for the poorer ear - what occurs? - ANSWER Shadow curve
Emphasizing counseling to maximize amplification benefits is: - ANSWER a program that
should start before fitting.
Calculations of amplifie...
When the better ear "answers" for the poorer ear - what occurs? - ANSWER Shadow curve
Emphasizing counseling to maximize amplification benefits is: - ANSWER a program that
should start before fitting.
Calculations of amplified sound to patients MCL do not include: - ANSWER reverse gain
Positive reinforcement involves: - ANSWER presenting a tone that is only inaudible without the
instrument on
Each of the semi circular canals: - ANSWER are oriented at 90 degrees to one another, contain
perilymph and endolymph and detect positioning and balance
Dynamic range is the useable range of hearing between : - ANSWER SRT and UCL
In digital signal processing a set of mathematical steps involving multiplication, addition, and
subtraction is referred to as - ANSWER an algorithm
Loudness recruitment - ANSWER refers to abnormal loudness growth of clients with SNH
When adjusting the volume control, the patient must: - ANSWER find an area on the control
where sounds are comfortable.
The ear canal contains - ANSWER cilia, ceruminous glands, and sebaceous glands
An audiogram with less loss at the high frequencies that the middle frequency region is
classified as a - ANSWER trough shaped curve
The saturation sound pressure level should - ANSWER directly relate to the clients UCL
Ideally when presenting recorded words in noise - ANSWER the words are 10dB louder than
the noise
The greatest acoustic change in an earmold or ITE is : - ANSWER parallel venting
All ANSI instrument measurements are - ANSWER SPL
When standard instrument has a telephone coil, the patient - ANSWER switches to the T
position
,Speech tests measured through the audiometer circuit: a - ANSWER are 20 db less because of
ANSI standards
The footplate of the stapes fits into the - ANSWER oval window
In a SNHL, air conduction thresholds - ANSWER are the same as bone conduction thresholds
If the outer and middle ear parts are normal: - ANSWER air thresholds will equal the bone
thresholds
undermasking is defined as - ANSWER occuring more often during air conduction testing.
The average resonant frequency of the ear canal plus concha is - ANSWER 2700 hz
Most auditory systems follow a power law. This logarithmic concept is: - ANSWER A 10 dB
increase in sound pressure doubles the loudness
The total number of neural fibers or neurons in the human auditory nerve is about : - ANSWER
30,000
In general, mold modifications are as follows: - ANSWER Venting affects lows, damping the
midrange and horn effects boost highs.
Basic verification involves: - ANSWER checking MCL and UCL in quiet and noise.
Sound field is - ANSWER a controlled environment
The configuration and height of the tympanogram can be a factor in deciding the proper matrix
for the fitting of a hearing aid: - ANSWER A high Type A tells us to decrease the output by 2-3
dB
You cannot use feedback checks when - ANSWER checking the telephone coil
Verification procedures: - ANSWER Check the accuracy of your fitting.
The problems produced by excessive ambient noise are - ANSWER greater for the lower
frequencies than the higher frequencies
The decibel is - ANSWER a ratio between two intensities
REUR measurement are taken in - ANSWER an open human ear canal
When a hearing aid is dead, you can check the receiver and microphone function by: -
ANSWER turning on the instrument telecoil
,The dividing line between the external and middle ear is the - ANSWER tympanic membrane
The cochlea, acting as a frequency analyzer, distributes acoustic stimuli to places along the
basilar membrane according to frequency. This forms the basis of a hypothesis called the: -
ANSWER Place Theory
An organic disorder is when there is damage to: - ANSWER The hearing mechanism, the neural
pathways and the brain.
The speed of sound in air, in feet per second, is : - ANSWER 1100
Properly selected hearing instruments should allow: - ANSWER The patient to wear an
instrument at a comfortable loudness level, improved communication and have better hearing
aided.
Crystal microphones and receivers: - ANSWER are very fragile
Which of the following is not a coupler used for measuring hearing aid performance? -
ANSWER Zwisks Ear Simulator
Small diameter tubing of SIA hearing aids has the effect of : - ANSWER reducing the high
frequency gain
The function of a microphone is to : - ANSWER convert acoustic energy into electrical energy
Vent an earmold : - ANSWER is the most common modification made on an earmold
When a new hearing instrument has feedback at the patients comfortable level, the problem is
usually: - ANSWER too much wax in the ear canal
With SIE-S hearing aids: - ANSWER The only signal is from the hearing aid and phrase effects
from a vent are not an issue.
The most comfortable level is: - ANSWER About 45 dB HL or 65 dB SPL for normal ears
Any complex sound can be broken down into individual frequencies by a technique known as: -
ANSWER Fourier Spectral analysis
The adult ear canal: - ANSWER rises upward and forward, then descends to the drum.
An effective verification is: - ANSWER a measure able improvement in communication
Which of the following is not included in correct test protocols? - ANSWER plugging the
hearing aid vent to control feedback
, Most conducive losses: - ANSWER Are medically correctable, display a breakdown or
obstruction in middle ear and display good discrimination
The T position on a hearing aid switch can be used to - ANSWER amplify a telephone
conversation, couple hearing aid into a loop inductor, couple directly into the audio of a radio or
tv
The following components can change or modify the frequency response of a hearing
instrument: - ANSWER a microphone
Afferent fibers: - ANSWER transmit from the cochlea to the brain.
User satisfaction must include: - ANSWER patient preferences
The following measurements use SPL as a reference: - ANSWER Probe microphones, sound
field aided thresholds, and ANSI specifications
Speech discrimination tests: - ANSWER approximate a sample of speech sounds in an ordinary
conversation.
A formant is: - ANSWER a frequency region within a complex tone where certain harmonics
have relatively large energy.
Malingering is a category of : - ANSWER non organic loss
Bone conduction threshold worse than air conduction thresholds may be caused by : - ANSWER
poor placement of vibrator, skull fracture, thickness of skull
Part of the basic law of electrical energy is : - ANSWER protons attract electrons
Some patients with binaural amplification can experience: - ANSWER degredation effect
The scala tympani is filled with: - ANSWER perilymph
The following is a transducer: - ANSWER electret microphone
A sensorineural hearing loss is due to a disorder in the: - ANSWER Inner ear
In pure tone testing, threshold means : - ANSWER the lowest intensity the client hears 50% of
the time.
The ear, due to its physical characteristics, enhances which frequencies? - ANSWER 2,000 -
5,000hz
When performing aided sound field testing, what degree of angle (from the patient/client) is the
speaker to be placed? - ANSWER 45
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