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GN Otometrics A/S
User Manual
CAPELLA Cochlear Emissions Analyzer
3.1.5
Tympanometry (immittance measurements)
Standards:
EN 61027, ANSI S3.39
Pump direction:
Neg. to pos. and pos. to neg. selectable
Pump accuracy:
±10% or ±10 daPa, whichever is greater. Plunger-type pump control-
led digitally by stepper motor
Pressure range:
-400, -350, -300, -250, -200, -150, and -100 daPa to 100, 150 and 200
daPa
Pump speed:
50, 100, 200 and 400 daPa/sec plus As Fast As Possible
Probe tone:
226 Hz at 85 dB SPL and 1000 Hz at 75 dB SPL, selectable
Volume range:
0.1 to 8 ml
Y-axis scaling:
0.3, 0.6, 0.9, 1.5, 3, 4.5 ml and Auto
Smoothing:
On/off selectable before or after measurement
Sweep start:
From probe, from screen, or automatic when volume detected
Leak detect:
On/off selectable
Air release:
From screen or from keyboard or automatically if pressure exceeds -
800 daPa or 600 daPa
Measurement status:
Pop-up box displays pump position and status messages in real time
Tympanogram characteristics
displayed:
Cartesian tymp. plot; current measured volume and static pressure
in real time; calculated values for ECV, MEP, SC, Grad, TW; and
tymp. Type (A, AD, AS, B, C, D, E)
