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IHS Final Study Guide Questions and Answers 2024
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IHS Final Study Guide
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IHS Final Study GuideThe fleshy part of the ear that protrudes from the side of the head is called the - answer
Auricle or Pinna
The average adults canal is about _____ inch in length and about _____ inch in
diameter - answer1 and ¼
The cone of light is a reflection of the light from - answer an otoscope on the tympanic
membrane
The external auditory canal's resonant frequency is - answer about 2700hz and varies
slightly from person to person
The structure of the tympanic membrane is made up of - answer3 layers
The transduction of energy as acoustical sound courses through the middle ear which is
as follows - answerAcoustical energy is changed into mechanical energy at the
tympanic membrane and changed into hydraulic energy at the stapes footplate
The promontory is located on the medial wall of the middle ear - answerIt represents the
basal turn of the cochlea
Otitis media is an ear infection that may - answerresult from Eustachian tube
dysfunction
Fluid in the middle ear is also called - answereffusion
Otosclerosis immobilizes the ossicles at the - answerstapes footplate
The cochlea in located with the petrous portion of the temporal bone. It coils in about -
answer2 ½ turns. Uncoiled it measures about 1 inch
Three chambers within the inner ear are called - answerscala vestibuli, scala media,
scala tympani
The basilar membrane and the reissner's membrane - answerseparate the cochlea into
three chambers.
The organ of Corti is - answerthe sensory receptor for hearing
The hair cells activate the auditory nerve - answerthrough electrochemical energy
, The Place Theory of Hearing is simply explained as - answerthe basal turn of the
cochlea responds to high frequencies and the apical turn of the cochlea responds to low
The singular perception of two different signals presented to each ear simultaneously is
- answerbinaural fusion
An octave is the - answerdoubling of a frequency
•Masking is define as a procedure used to - answereliminate the participation of the non
test ear while measuring some aspect of auditory function in the test ear
The symbol used to document that thresholds were measured with masking presented
to the NTE are - answera blue square for the left ear and a red triangle for the right ear
The formula used to determine the initial masking intensity to be delivered to the -
answerNTE is AC of NTE + 10db
The increase in loudness when both ears hear together - answeris binaural summation
Sensory/Neural hearing loss is caused by damage or a disorder involving the -
answerhair cells or auditory nerve
•Recruitment can result in an - answerexaggerated sensitivity to loud sounds
•In ears with cochlear damage, the critical bands - answerare wider than 1/3 octave
The impact of sensory/neural hearing loss on critical bands results in: - answerdifficulty
with speech intelligibility in quiet and noise
An audiometric finding that may indicate a retrocochlear disorder is: -
answerasymmetric word recognition scores in the presence of symmetrical hearing
levels
Ototoxic medications result in damage to - answerthe organ of Corti
A neural disconnection of the auditory centers of the cortex with the rest of the hearing
system is - answerknown as "central deafness".
A tympanometer is used to measure - answermiddle ear function
For threshold measurement each tone presented should be about - answer2 second in
duration
Test/retest reliability for threshold measurements - answeris: + 5 db
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