Welch Allyn MicroTymp Operating Instructions Manual page 42

sound pressure-the
pressure that occurs during sound transmission and the ambient
air pressure.
static admittance-the
pressure corresponding to the tympanometric peak. It is calculated
by subtracting the admittance of the ear canal from the admit-
tance at the tympanometric peak. The MicroTymp estimates static
admittance by subtracting the admittance at 200 daPa from the
peak admittance.
tympanogram-a
function of ear canal air pressure.
tympanometric gradient-a
gram in the region of the tympanometric peak. The MicroTymp
calculates the gradient by determining the pressure interval
corresponding to a 50% reduction in admittance on either side
of the peak. Also called the tympanometric width.
tympanometric peak pressure-the
at which the tympanometric peak occurs.
tympanometric width-see tympanometric gradient.
tympanometry-the measurement of acoustic admittance in the
sealed ear canal as a function of ear canal air pressure.
tympanosclerosis-a complication of otitis media that is charac-
terized by sclerotic regions involving the tympanic membrane,
ossicles, and middle ear mucosa. Tympanosclerosis increases
the stiffness of the middle ear system.
volume velocity-the
per unit time.
average (rms) difference between the air
admittance of the middle ear at the air
recording of the admittance of the ear as a
measure of the shape of the tympano-
volume of air that passes through a plane
41
value of ear canal air pressure