IHS CORRECT STUDYS ANSWERS AND QUESTIONS
SET A+
✔✔What is the dividing line between low and high frequency tones? - ✔✔1000 Hz
✔✔A new patient/client comes in for a hearing evaluation. They indicate that they are
having a lot of trouble distinguishing between speech sounds like 'ith' and 'if' as well as
hearing in background noise. Which factor may be causing this patient's/client's
challenges? - ✔✔widening of the patient's critical bands.
✔✔What effect does a 10 dB SPL increase in intensity have on the sensation of
loudness over most of the audible range? - ✔✔a 10 dB SPL increase would double
loudness perception.
✔✔When two 40 dB SPL sounds are combined, what is the resulting dB SPL? - ✔✔46
dB SPL
✔✔A hearing aid specialist is presenting a tone to a patient/client. They want to be sure
that the patient/client hears the tone, so they present it at a level that is 20 dB above the
patient's/client's threshold at 1000 Hz, which is 30 dB HL. How should the hearing aid
specialist notate this presentation level? - ✔✔20dB SL
✔✔How are changes in intensity and frequency perceived? - ✔✔As changes in
loudness and pitch.
✔✔A patient/client is in the office for a 6-month follow-up appointment. They express
that they are generally very satisfied with their hearing aids. However, they are still
having trouble in the conference area at work as it is a large room with only hard
surfaces. Which acoustic principle can be applied to decrease the patient's/client's
difficulty? - ✔✔Absorption
✔✔Which frequency of pure tone will be perceived as the loudest when presented at 60
dB SPL: 1000 Hz, 250 Hz, or 8000 Hz? - ✔✔1000 Hz
,✔✔What is the average adult ear canal lenth and diameter? - ✔✔2.54 cm long and 0.7
cm in diameter.
✔✔What are the two main functions of the middle ear muscles? - ✔✔Keeping the
ossicles taut so they respond efficiently and contracting to protect the ear from very loud
sounds (MEMR)
✔✔What type of hearing loss can be caused by ossicular fixation? - ✔✔Conductive
Hearing Loss
✔✔Which nerve is responsible for Arnold's Reflex? - ✔✔vagus nerve (CN X)
✔✔A hearing aid specialist is performing a hearing evaluation on a patient/client. During
otoscopy, the hearing aid specialist discovers that the patient/client has collapsed ear
canals. How should the hearing aid specialist proceed? - ✔✔Test using insert
earphones.
✔✔What landmarks should always be visible when when performing otoscopy on a
healthy tympanic membrane? - ✔✔The cone of light, umbo, manubrium, lateral (short)
process of the malleus, tympanic annulus, pars flacida, pars tensa
✔✔A new patient/client is in for a hearing evaluation. Case history shows that the
patient/client is a frequent scuba diver. Otoscopy reveals a bony growth in both ear
canals. What should the hearing aid specialist say to the patient/client? - ✔✔There are
unusual bumps in your ear canals, so I am going to refer you to a physician.
✔✔What is the purpoase of impedance matching in the middle ear? - ✔✔to increase the
signal intensity from the TM to match the resistance of the fluid in the inner ear
✔✔A patient/client comes to the office for a hearing evaluation. They report that they
have only begun noticing a hearing difficulty in the past week. Otoscopic inspection
reveals cerumen blocking three quadrants of the tympanic membrane. How should the
hearing aid specialist proceed? - ✔✔Make a medical referral.
✔✔How does the external ear canal's resonant frequency affect hearing? - ✔✔It boosts
the intensity of high frequency sounds.
✔✔What is the name for the narrowest part of the ear canal? - ✔✔Isthmus
✔✔What is the name for the bowl of the pinna/outer ear? - ✔✔concha
✔✔Which actions cause the Eustachian tube to open in adults? - ✔✔coughing,
yawning, sneezing, swallowing.
, ✔✔Where does otosclerosis immobilize the ossicles? - ✔✔stapes footplate
✔✔A patient/client comes in for a hearing evaluation. Visual inspection reveals a
deformity of their left outer ear. Audiometric testing shows normal thresholds for the
right ear. If hearing loss is present in the left ear, which type can be expected? -
✔✔conductive
✔✔What are the medical names of the three middle ear bones? - ✔✔malleus, incus,
stapes
✔✔What is always required in the presence of drainage in the ear canal? - ✔✔medical
referral
✔✔A patient/client comes to the office for a hearing evaluation. When they enter the
office, they are wearing large noise canceling headphones. They indicate that everyday
environmental sounds are very bothersome to them. What might the patient/client be
experiencing? - ✔✔hyperacusis
✔✔A 45-year-old patient/client has high frequency hearing loss; thresholds are poorest
at 4000 Hz and slightly better at 8000 Hz. Case history reveals that the patient/client
works in a factory and plays in a rock band. Damage in what structure in the cochlea is
likely causing this patient's/client's hearing loss? - ✔✔inner and/or outer hair cells.
✔✔A patient/client comes to the office for a hearing evaluation. Otoscopy is
unremarkable. Pure tone testing reveals moderate bilaterally symmetrical flat
sensorineural hearing loss. The patient/client has WRS of 36% in the right ear and 90%
in the left ear. The SRTs are 40 dB and PTAs are 45 dB. Why should the hearing aid
specialist refer this patient/client to a physician? - ✔✔asymmetrical WRS
✔✔A patient/client comes to the office for a hearing evaluation with their spouse. The
patient/client does not think they have any problems hearing. The spouse complains
that when they are watching TV everything will be fine at a low volume but if the spouse
turns up the volume even a little bit, the patient/client overreacts and says the volume is
way too loud. What might the patient/client be experiencing? - ✔✔recruitment
✔✔What is the relationship between the function of the oval and round windows? -
✔✔Acoustic energy is transferred to the cochlea from the middle ear at the oval window
and pressure is released at the round window.
✔✔A 65-year-old patient/client taking antibiotics and a diuretic comes for a hearing
evaluation. They are a retired gun range instructor. They complain that their hearing has
gotten worse since they started taking their new medications. They have never worn
hearing aids in the past. Audiometric testing reveals a bilaterally symmetrical
SET A+
✔✔What is the dividing line between low and high frequency tones? - ✔✔1000 Hz
✔✔A new patient/client comes in for a hearing evaluation. They indicate that they are
having a lot of trouble distinguishing between speech sounds like 'ith' and 'if' as well as
hearing in background noise. Which factor may be causing this patient's/client's
challenges? - ✔✔widening of the patient's critical bands.
✔✔What effect does a 10 dB SPL increase in intensity have on the sensation of
loudness over most of the audible range? - ✔✔a 10 dB SPL increase would double
loudness perception.
✔✔When two 40 dB SPL sounds are combined, what is the resulting dB SPL? - ✔✔46
dB SPL
✔✔A hearing aid specialist is presenting a tone to a patient/client. They want to be sure
that the patient/client hears the tone, so they present it at a level that is 20 dB above the
patient's/client's threshold at 1000 Hz, which is 30 dB HL. How should the hearing aid
specialist notate this presentation level? - ✔✔20dB SL
✔✔How are changes in intensity and frequency perceived? - ✔✔As changes in
loudness and pitch.
✔✔A patient/client is in the office for a 6-month follow-up appointment. They express
that they are generally very satisfied with their hearing aids. However, they are still
having trouble in the conference area at work as it is a large room with only hard
surfaces. Which acoustic principle can be applied to decrease the patient's/client's
difficulty? - ✔✔Absorption
✔✔Which frequency of pure tone will be perceived as the loudest when presented at 60
dB SPL: 1000 Hz, 250 Hz, or 8000 Hz? - ✔✔1000 Hz
,✔✔What is the average adult ear canal lenth and diameter? - ✔✔2.54 cm long and 0.7
cm in diameter.
✔✔What are the two main functions of the middle ear muscles? - ✔✔Keeping the
ossicles taut so they respond efficiently and contracting to protect the ear from very loud
sounds (MEMR)
✔✔What type of hearing loss can be caused by ossicular fixation? - ✔✔Conductive
Hearing Loss
✔✔Which nerve is responsible for Arnold's Reflex? - ✔✔vagus nerve (CN X)
✔✔A hearing aid specialist is performing a hearing evaluation on a patient/client. During
otoscopy, the hearing aid specialist discovers that the patient/client has collapsed ear
canals. How should the hearing aid specialist proceed? - ✔✔Test using insert
earphones.
✔✔What landmarks should always be visible when when performing otoscopy on a
healthy tympanic membrane? - ✔✔The cone of light, umbo, manubrium, lateral (short)
process of the malleus, tympanic annulus, pars flacida, pars tensa
✔✔A new patient/client is in for a hearing evaluation. Case history shows that the
patient/client is a frequent scuba diver. Otoscopy reveals a bony growth in both ear
canals. What should the hearing aid specialist say to the patient/client? - ✔✔There are
unusual bumps in your ear canals, so I am going to refer you to a physician.
✔✔What is the purpoase of impedance matching in the middle ear? - ✔✔to increase the
signal intensity from the TM to match the resistance of the fluid in the inner ear
✔✔A patient/client comes to the office for a hearing evaluation. They report that they
have only begun noticing a hearing difficulty in the past week. Otoscopic inspection
reveals cerumen blocking three quadrants of the tympanic membrane. How should the
hearing aid specialist proceed? - ✔✔Make a medical referral.
✔✔How does the external ear canal's resonant frequency affect hearing? - ✔✔It boosts
the intensity of high frequency sounds.
✔✔What is the name for the narrowest part of the ear canal? - ✔✔Isthmus
✔✔What is the name for the bowl of the pinna/outer ear? - ✔✔concha
✔✔Which actions cause the Eustachian tube to open in adults? - ✔✔coughing,
yawning, sneezing, swallowing.
, ✔✔Where does otosclerosis immobilize the ossicles? - ✔✔stapes footplate
✔✔A patient/client comes in for a hearing evaluation. Visual inspection reveals a
deformity of their left outer ear. Audiometric testing shows normal thresholds for the
right ear. If hearing loss is present in the left ear, which type can be expected? -
✔✔conductive
✔✔What are the medical names of the three middle ear bones? - ✔✔malleus, incus,
stapes
✔✔What is always required in the presence of drainage in the ear canal? - ✔✔medical
referral
✔✔A patient/client comes to the office for a hearing evaluation. When they enter the
office, they are wearing large noise canceling headphones. They indicate that everyday
environmental sounds are very bothersome to them. What might the patient/client be
experiencing? - ✔✔hyperacusis
✔✔A 45-year-old patient/client has high frequency hearing loss; thresholds are poorest
at 4000 Hz and slightly better at 8000 Hz. Case history reveals that the patient/client
works in a factory and plays in a rock band. Damage in what structure in the cochlea is
likely causing this patient's/client's hearing loss? - ✔✔inner and/or outer hair cells.
✔✔A patient/client comes to the office for a hearing evaluation. Otoscopy is
unremarkable. Pure tone testing reveals moderate bilaterally symmetrical flat
sensorineural hearing loss. The patient/client has WRS of 36% in the right ear and 90%
in the left ear. The SRTs are 40 dB and PTAs are 45 dB. Why should the hearing aid
specialist refer this patient/client to a physician? - ✔✔asymmetrical WRS
✔✔A patient/client comes to the office for a hearing evaluation with their spouse. The
patient/client does not think they have any problems hearing. The spouse complains
that when they are watching TV everything will be fine at a low volume but if the spouse
turns up the volume even a little bit, the patient/client overreacts and says the volume is
way too loud. What might the patient/client be experiencing? - ✔✔recruitment
✔✔What is the relationship between the function of the oval and round windows? -
✔✔Acoustic energy is transferred to the cochlea from the middle ear at the oval window
and pressure is released at the round window.
✔✔A 65-year-old patient/client taking antibiotics and a diuretic comes for a hearing
evaluation. They are a retired gun range instructor. They complain that their hearing has
gotten worse since they started taking their new medications. They have never worn
hearing aids in the past. Audiometric testing reveals a bilaterally symmetrical
