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COMD3700.12 Test With Complete Solution
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COMD3700.12 Test With CompleteSolution
basic immittance measures include - Answer static compliance
tympanometry
acoustic reflex testing
*thresholds
*decay
eustachian tube function
the aim of tympanometry is to - Answer determine the pressure at which the TM is
maximally compliant and the amount of compliance at that point
when does the TM vibrate most efficiently? - Answer when the pressure on both sides of
the membrane is equal
tympanometry is conducted using a low frequency probe tone of - Answer 220 or 226 Hz
tympanometry - Answer measure of the compliance of the TM with varying degrees of
positive and negative pressure in the external auditory canal; one of the principal
subtests of immittance audiometry
immittance audiometry - Answer objective procedure that assesses the relative
impedance, and admittance or compliance in an individual ear
3 subtests of immittance audiometry - Answer tympanometry
static admittance / compliance
acoustic reflex
tympanometry - Answer assesses the ability of the TM to accept sound; dynamic
measure (meaning TM is in motion during the test)
basic approach in tympanometry - Answer introduce a pure-tone 220 or 226 Hz tone into
the external auditory meatus and measure how much of that sound wave is accepted
(admitted) or rejected (impeded) by the TM; probe plays a continuous tone and
measures how much sound is reflected of the TM at different pressures
in the normal ear the TM will accept most of the sound when the air in the ear canal is -
Answer very close to normal atmospheric pressure
tympanogram - Answer graph of impedence / admittance values against air pressure
, values
the shape and measurements on the tympanogram provide info about - Answer what is
occuring in the middle ear space and eustachian tube
identical to cubic centimeter cm3 - Answer milliliters mL
under standard atmospheric conditions, the acoustic admittance of a 1 cc cavity is
equal to - Answer 1 mmho at 226 Hz
what pressures are used during a tympanometric exam? - Answer +200 mm H2O
+100 mm H2O
+50 mm H20
0 mm H2O
-50 mm H2O
-100 mm H2O
-200 mm H2O
at various pressure levels, the tympanometer - Answer takes measurements at each
point then plots the amount of sound pressure at each point and connects the dots
ECV - Answer ear canal volume
tympanogram elements - Answer ear canal volume
peak compliance
ear indicator
pressure peak
pressure tracing
pressure levels (+200, 0, -400 daPa)
unit of measure
gradient
mm H2O is equal to - Answer daPa
static acoustic compliance is sometimes referred to as - Answer static acoustic
admittance or static immittance
static acoustic compliance - Answer determines the degree of stiffness of the TM and
ossicular chain; measures the mobility of the TM in response to a given pressure;
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