Maico easyTymp User Manual

Operation Manual easyTymp
8111254 Rev. 9
52
17/01/2018
IMPEDANCE CALIBRATION PROPERTIES
Probe tone
Frequencies:
226 Hz  1 %, 1000 Hz  1 %
Level:
85 dB SPL 1.5 dB measured in an IEC 60318-5
Acoustic coupler. The level is constant for all
volumes in the measurement range.
On-Off ratio:
SNR ratio:
A-Weighted noise in
off condition:
Rise-Fall times
> 70 dB
> 70 dB
< 25 dB
> 5 ms
Distortion:
Max. 1 % THD
Compliance
Range:
0.1 ml to 8.0 ml
Temperature
dependence:
-0.003 ml/C
Pressure dependence:
-0.00020 ml/daPa
Reflex sensitivity:
0.001 ml is the lowest detectable volume
change
Temporal reflex
characteristics:
Initial latency = 35 ms (5 ms)
Rise time = 45 ms (5 ms)
Terminal latency = 35 ms (5 ms)
Fall time = 45 ms (5 ms)
Overshoot = max. 1 %
Undershoot = max. 1 %
Pressure
Range:
-400 daPa to +200 daPa
Safety limits:
-750 daPa and +550 daPa, 50 daPa
REFLEX CALIBRATION STANDARDS AND SPECTRAL PROPERTIES
General
Specifications for stimulus signals are made to follow IEC 60645-5
Ipsi- and Contra-
Pure tone:
3 dB for 500 Hz to 4000 Hz
lateral Earphone
Broad-band
noise (BBN):
Spectral properties:
MAICO Standard
As “Broad-band noise” specified in
IEC 60645-5, but with 500 Hz as lower cut-off
frequency.
General about levels:
The actual sound pressure level at the
eardrum will depend on the volume of the ear.
The risk of artifacts at higher stimulus levels in reflex measurements are minor and will
not activate the reflex detection system.

Maico easyTymp Specifications

General

Brand	Maico
Model	easyTymp
Category	Medical Equipment
Language	English