IHS Actual Exam 2025 Questions and
Answers
In general, mold modifications are as follows: - ANS Venting affects lows, damping the
midrange and horn effects boost highs.
Basic verification involves: - ANS checking MCL and UCL in quiet and noise.
Sound field is - ANS 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: - ANS A high Type A tells us to decrease the output by 2-3 dB
You cannot use feedback checks when - ANS checking the telephone coil
Verification procedures: - ANS Check the accuracy of your fitting.
The problems produced by excessive ambient noise are - ANS greater for the lower
frequencies than the higher frequencies
The decibel is - ANS a ratio between two intensities
REUR measurement are taken in - ANS an open human ear canal
Pg. 1 Copyright © 2025 Jasonmcconell. ALL RIGHTS RESERVED.
,When a hearing aid is dead, you can check the receiver and microphone function by: -
ANS turning on the instrument telecoil
The dividing line between the external and middle ear is the - ANS 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: -
ANS Place Theory
An organic disorder is when there is damage to: - ANS The hearing mechanism, the neural
pathways and the brain.
The speed of sound in air, in feet per second, is : - ANS 1100
Properly selected hearing instruments should allow: - ANS The patient to wear an instrument
at a comfortable loudness level, improved communication and have better hearing aided.
Crystal microphones and receivers: - ANS are very fragile
Which of the following is not a coupler used for measuring hearing aid performance? -
ANS Zwisks Ear Simulator
Small diameter tubing of SIA hearing aids has the effect of : - ANS reducing the high
frequency gain
The function of a microphone is to : - ANS convert acoustic energy into electrical energy
Vent an earmold : - ANS is the most common modification made on an earmold
Pg. 2 Copyright © 2025 Jasonmcconell. ALL RIGHTS RESERVED.
, When a new hearing instrument has feedback at the patients comfortable level, the problem is
usually: - ANS too much wax in the ear canal
With SIE-S hearing aids: - ANS The only signal is from the hearing aid and phrase effects from
a vent are not an issue.
The most comfortable level is: - ANS 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: -
ANS Fourier Spectral analysis
The adult ear canal: - ANS rises upward and forward, then descends to the drum.
An effective verification is: - ANS a measure able improvement in communication
Which of the following is not included in correct test protocols? - ANS plugging the hearing
aid vent to control feedback
Most conducive losses: - ANS 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 - ANS 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: - ANS a microphone
Pg. 3 Copyright © 2025 Jasonmcconell. ALL RIGHTS RESERVED.
Answers
In general, mold modifications are as follows: - ANS Venting affects lows, damping the
midrange and horn effects boost highs.
Basic verification involves: - ANS checking MCL and UCL in quiet and noise.
Sound field is - ANS 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: - ANS A high Type A tells us to decrease the output by 2-3 dB
You cannot use feedback checks when - ANS checking the telephone coil
Verification procedures: - ANS Check the accuracy of your fitting.
The problems produced by excessive ambient noise are - ANS greater for the lower
frequencies than the higher frequencies
The decibel is - ANS a ratio between two intensities
REUR measurement are taken in - ANS an open human ear canal
Pg. 1 Copyright © 2025 Jasonmcconell. ALL RIGHTS RESERVED.
,When a hearing aid is dead, you can check the receiver and microphone function by: -
ANS turning on the instrument telecoil
The dividing line between the external and middle ear is the - ANS 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: -
ANS Place Theory
An organic disorder is when there is damage to: - ANS The hearing mechanism, the neural
pathways and the brain.
The speed of sound in air, in feet per second, is : - ANS 1100
Properly selected hearing instruments should allow: - ANS The patient to wear an instrument
at a comfortable loudness level, improved communication and have better hearing aided.
Crystal microphones and receivers: - ANS are very fragile
Which of the following is not a coupler used for measuring hearing aid performance? -
ANS Zwisks Ear Simulator
Small diameter tubing of SIA hearing aids has the effect of : - ANS reducing the high
frequency gain
The function of a microphone is to : - ANS convert acoustic energy into electrical energy
Vent an earmold : - ANS is the most common modification made on an earmold
Pg. 2 Copyright © 2025 Jasonmcconell. ALL RIGHTS RESERVED.
, When a new hearing instrument has feedback at the patients comfortable level, the problem is
usually: - ANS too much wax in the ear canal
With SIE-S hearing aids: - ANS The only signal is from the hearing aid and phrase effects from
a vent are not an issue.
The most comfortable level is: - ANS 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: -
ANS Fourier Spectral analysis
The adult ear canal: - ANS rises upward and forward, then descends to the drum.
An effective verification is: - ANS a measure able improvement in communication
Which of the following is not included in correct test protocols? - ANS plugging the hearing
aid vent to control feedback
Most conducive losses: - ANS 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 - ANS 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: - ANS a microphone
Pg. 3 Copyright © 2025 Jasonmcconell. ALL RIGHTS RESERVED.
