Operation Manual touchTymp MI 26 and MI 36 Version
8511780 Rev. 4
82
30/06/2021
ACOUSTIC REFLEXES
Test methods:
Ipsilateral and Contralateral
Test signals:
Pure Tones:
Noise (MI 36):
500 Hz, 1000 Hz, 2000 Hz, 4000 Hz each with ±1 %
Broadband, High Pass, Low Pass
Test level:
Ipsilateral: 70 dB HL to 105 dB HL
Contralateral: 70 dB HL to 120 dB HL
Control Acoustic
Reflexes:
Automatic
Test types:
Single intensities (Fixed Level)
Reflex threshold (Automatic Level in 5 dB steps)
Stimulus
Presentation
Control:
ON-OFF
ratio = ≥ 70 dB
Rise time = 27.0 ms
Fall time = 24.6 ms
Signal to noise Ratio > 70 dB
A-weighted noise in OFF condition < 25 dBSPL
Normative data:
MAICO Standard Values
Graphical display:
x-axis: Volume in ml
y-axis:Time in ms
Level in dB HL
Ipsi earphone:
Earphone integrated in probe
Contralateral
headphones:
Insert
earphone:
Headphone
s:
IP30
DD45 C
Test types:
Automated
Reflex:
Reflex
Decay:
Automatic/Fixed
Manual, 10 dB above threshold and stimulus
durations of 10 seconds.
IMMITTANCE CALIBRATION PROPERTIES
Compliance:
Temperature
dependence:
-0.003 ml/°C
-0.031 ml/°F
Pressure
dependence:
-0.0002 ml/daPa
Reflex:
Sensitivity:
0.001 ml is the lowest detectable volume change.
Reflex
artifact level:
≥95 dB SPL (measured in the 711 coupler, 0.2 ml,
0.5 ml, 2.0 ml and 5.0 ml hardwalled cavities).
Temporal
reflex
character-
istics:
•
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 %
•
ON and OFF time = 750 ms
There is no deviation between static and dynamic mode.
Summary of Contents for touchTymp MI 26
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