IHS Questions- For License Prep
The adult ear canal: - correct answer Rises upward and forward then descends to the drum
The isthmus is: - correct answer Where the canal narrows to enter the temporal bone
The pinna and the external canal together: - correct answer -Gather and reinforce accoustical
signals
-With the irregular shape of the auricle, cause increases and decreases at different frequencies
as the sound arrives at the ear.
-Forms a resonating tube.
The average resonant frequency of the ear canal plus concha is: - correct answer 2700 Hz.
The dividing line between the external ear and the middle ear is the: - correct answer Tympanic
membrane.
The ear canal contains: - correct answer Cilia, ceruminous glands. sebaceous glands.
The vagus nerve (Xth cranial) is found: - correct answer Along the bottom of the ear canal.
These are parts of the tympanic membrane: - correct answer Pars tensa, Pars flaccida, Umbo.
An otoscopic inspection should reveal: - correct answer A clear view of the white tympanic
membrane.
These are parts of the pinna: - correct answer Tragus, intertragal notch, triangular fossa.
Atresia refers to: - correct answer A closure of the external auditory canal.
Perforation of the eardrum can be caused by: - correct answer -An infection
-A fracture of the temporal bone
-A nearby explosion.
These are types of hearing loss: - correct answer -Conductive
-Central
-Sensorineural
Conductive losses may be caused by: - correct answer A prolapsed canal
Impacted cerumen
Which surgical technique repairs the tympanic membrane? - correct answer Myringoplasty
A cholesteatoma can be described as: - correct answer A pouch of skin filled with epithelial
debris.
,When an excess of cerumen or a blockage of cerumen is detected, the hearing aid specialist
should: - correct answer Refer the patient to a physician.
A swollen ear may be caused by: - correct answer -Eczema
-Otitis externa
-Dermatitis
Tympanosclerosis may be described as: - correct answer Calcium deposits.
A tympanic membrane perforation may cause a: - correct answer Conductive loss.
Theoretically, the increase in sound pressure provided by the middle ear structure is about: -
correct answer 27 dB.
The footplate of the stapes fits into the: - correct answer Oval window.
A type "A" tympanogram would indicate: - correct answer Normal pressure and compliance.
The difference in area size between the tympanic membrane an the footplate of the stapes
increasing the sound pressure at the footplate is : - correct answer The transfer function or
aerial ratio.
The middle ear cavity contains: - correct answer Annular ligaments, malleus, stapes and tensor
tympani.
The middle ear system is often referred to as: - correct answer An impedance matching
transformer.
The middle ear cavity, as a transducer changes energy from one form to another. The energy
changes from: - correct answer Acoustic energy to mechanical energy to hydraulic energy.
The middle ear muscles contract, resulting in: - correct answer An acoustic reflex.
The Eustachian tube begins in the lower portion of the tympanic cavity and ends at the: -
correct answer Nasopharynx.
The Eustachian tube of a child is: - correct answer Straight, short, horizontal.
A cholesteatoma: - correct answer -Occurs in the middle ear
-May perforate the eardrum
-Is usually accompanied by a constant odorous discharge.
Change in either stiffness or mass occur when the normal middle ear function is altered by
disease or trauma causing: - correct answer A feeling of stuffiness or a complaint of hearing in a
barrel.
, Otosclerosis: - correct answer Occurs more often in women than men
Occurs more often in Caucasians than other races
Appears to be inherited
Most dysfunctions of the outer or middle ear cause a: - correct answer Conductive loss.
Otitis media may occur with: - correct answer Fluid in the middle ear.
A plastic or steel strut replaces the stapes during a: - correct answer Stapedectomy.
Treatment for chronic otitis media may include: - correct answer -Antibiotics
-Inflation of the Eustachian Tube
-Myringotomy
A radical mastiodectomy incudes removal of: - correct answer Ossicular chain, mastoid.
The ossicular chain is supported and suspended by: - correct answer Stapedius, tensor tympani
and ligaments.
The ear, due to its physical characteristics, enhances which frequencies? - correct answer
2,000-5,000 Hz.
In a cross section of the cochlea, the minimum number of rows of hair cells you can see is: -
correct answer 4
The total number of neural fibers or neurons in the human auditory nerve is about? - correct
answer 30,000
The basilar membrane separates: - correct answer The scala media and the scala tympani
The scala tympani is filled with: - correct answer Perilymph
The base of the cochlea: - correct answer begins at the oval window
The fibers of the auditory nerve, at the point of maximum stimulation of the basilar membrane,
discharge and recover at a rate of approximately: - correct answer Up to 1Khz identical to the
stimulus frequency.
The cochlea, acting as a frequency analyzer, distributes acoustic stimuli to places along the
basilar membranes according to frequency, This forms the basis of a hypothesis called the: -
correct answer Place theory.
Each of the semi-circular canals: - correct answer -Are orinted at 90 degrees to one another.
-Contain perilymph and endolymph.
-Detect positioning and balance.
The adult ear canal: - correct answer Rises upward and forward then descends to the drum
The isthmus is: - correct answer Where the canal narrows to enter the temporal bone
The pinna and the external canal together: - correct answer -Gather and reinforce accoustical
signals
-With the irregular shape of the auricle, cause increases and decreases at different frequencies
as the sound arrives at the ear.
-Forms a resonating tube.
The average resonant frequency of the ear canal plus concha is: - correct answer 2700 Hz.
The dividing line between the external ear and the middle ear is the: - correct answer Tympanic
membrane.
The ear canal contains: - correct answer Cilia, ceruminous glands. sebaceous glands.
The vagus nerve (Xth cranial) is found: - correct answer Along the bottom of the ear canal.
These are parts of the tympanic membrane: - correct answer Pars tensa, Pars flaccida, Umbo.
An otoscopic inspection should reveal: - correct answer A clear view of the white tympanic
membrane.
These are parts of the pinna: - correct answer Tragus, intertragal notch, triangular fossa.
Atresia refers to: - correct answer A closure of the external auditory canal.
Perforation of the eardrum can be caused by: - correct answer -An infection
-A fracture of the temporal bone
-A nearby explosion.
These are types of hearing loss: - correct answer -Conductive
-Central
-Sensorineural
Conductive losses may be caused by: - correct answer A prolapsed canal
Impacted cerumen
Which surgical technique repairs the tympanic membrane? - correct answer Myringoplasty
A cholesteatoma can be described as: - correct answer A pouch of skin filled with epithelial
debris.
,When an excess of cerumen or a blockage of cerumen is detected, the hearing aid specialist
should: - correct answer Refer the patient to a physician.
A swollen ear may be caused by: - correct answer -Eczema
-Otitis externa
-Dermatitis
Tympanosclerosis may be described as: - correct answer Calcium deposits.
A tympanic membrane perforation may cause a: - correct answer Conductive loss.
Theoretically, the increase in sound pressure provided by the middle ear structure is about: -
correct answer 27 dB.
The footplate of the stapes fits into the: - correct answer Oval window.
A type "A" tympanogram would indicate: - correct answer Normal pressure and compliance.
The difference in area size between the tympanic membrane an the footplate of the stapes
increasing the sound pressure at the footplate is : - correct answer The transfer function or
aerial ratio.
The middle ear cavity contains: - correct answer Annular ligaments, malleus, stapes and tensor
tympani.
The middle ear system is often referred to as: - correct answer An impedance matching
transformer.
The middle ear cavity, as a transducer changes energy from one form to another. The energy
changes from: - correct answer Acoustic energy to mechanical energy to hydraulic energy.
The middle ear muscles contract, resulting in: - correct answer An acoustic reflex.
The Eustachian tube begins in the lower portion of the tympanic cavity and ends at the: -
correct answer Nasopharynx.
The Eustachian tube of a child is: - correct answer Straight, short, horizontal.
A cholesteatoma: - correct answer -Occurs in the middle ear
-May perforate the eardrum
-Is usually accompanied by a constant odorous discharge.
Change in either stiffness or mass occur when the normal middle ear function is altered by
disease or trauma causing: - correct answer A feeling of stuffiness or a complaint of hearing in a
barrel.
, Otosclerosis: - correct answer Occurs more often in women than men
Occurs more often in Caucasians than other races
Appears to be inherited
Most dysfunctions of the outer or middle ear cause a: - correct answer Conductive loss.
Otitis media may occur with: - correct answer Fluid in the middle ear.
A plastic or steel strut replaces the stapes during a: - correct answer Stapedectomy.
Treatment for chronic otitis media may include: - correct answer -Antibiotics
-Inflation of the Eustachian Tube
-Myringotomy
A radical mastiodectomy incudes removal of: - correct answer Ossicular chain, mastoid.
The ossicular chain is supported and suspended by: - correct answer Stapedius, tensor tympani
and ligaments.
The ear, due to its physical characteristics, enhances which frequencies? - correct answer
2,000-5,000 Hz.
In a cross section of the cochlea, the minimum number of rows of hair cells you can see is: -
correct answer 4
The total number of neural fibers or neurons in the human auditory nerve is about? - correct
answer 30,000
The basilar membrane separates: - correct answer The scala media and the scala tympani
The scala tympani is filled with: - correct answer Perilymph
The base of the cochlea: - correct answer begins at the oval window
The fibers of the auditory nerve, at the point of maximum stimulation of the basilar membrane,
discharge and recover at a rate of approximately: - correct answer Up to 1Khz identical to the
stimulus frequency.
The cochlea, acting as a frequency analyzer, distributes acoustic stimuli to places along the
basilar membranes according to frequency, This forms the basis of a hypothesis called the: -
correct answer Place theory.
Each of the semi-circular canals: - correct answer -Are orinted at 90 degrees to one another.
-Contain perilymph and endolymph.
-Detect positioning and balance.
