Welch Allyn MicroTymp® 4 Tympanometer User Manual
DIR 80024157 Ver A
Page 40
A
PPENDIX
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T
ECHNICAL
S
PECIFICATION
Tympanometry
Instrument type
Meatus compensated tympanometer
Analysis performed
Admittance peak level (in ml); Pressure of same;
Gradient (in daPa);
Ear Canal Volume (ECV) @ 200 daPa
Probe tone levels and accuracy
226Hz +/- 2%; 85dB SPL +/-2dB over range 0.2ml
to 5ml
Pressure levels and accuracy
+200daPa to -4/-10daPa or +/-10%
(whichever is larger) over range
Ear volume measurement range and
accuracy
0.2ml to 5ml +/- 0.1ml or +/-5% (whichever is
larger) over entire range
Sweep speed
Typically 200daPa/sec; dependent on ear/cavity
volume
Pressure limits (safety cutout)
+600 to -800 daPa
Number of samples stored
100 per tympanogram
Reflex measurements
Measurement modes
Ipsilateral
Reflex tone levels and accuracy
500Hz, 1kHz, 2kHz, 4kHz (+/-2%)
Configurable over range 70dB to 100dBHL (4kHz
restricted to 95dBHL) +/-3dB, referenced to 2ml
calibration volume; Compensates for measured
ear volume
Reflex detection threshold and accuracy
0.01ml to 0.5ml +/-0.01ml configurable in 0.01ml
steps
