Maico touchTymp MI 26, Руководство по эксплуатации

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Operation Manual touchTymp MI 26 and MI 36 Version
8511780 Rev. 4 68 30/06/2021
5.6.9 Settings
– Acoustic Reflexes – General
Figure 124
Figure 125
Presentation: Defines the Acoustic Reflex screen to
start in graphical or table format (Figure 124).
The selection here will also define the presentation on the
print-out.
Axis : Defines the reflex deflection is displayed negative or
positive on the graphical display (Figure 125). The selection
here will also define the graphical presentation on the print-
out and
Reflex Decay display for MI 36 version.
Figure 126
Pass criterion : Defines the deflection value that must be
measured for the reflex to be considered an accepted
measurement (Figure 126). The options for selection include:
•
0.03 ml (default): If a change in compliance greater than
0.03 ml is detected, a reflex is considered present.
•
0.05 ml: If a change in compliance greater than
0.05 ml is detected, a reflex is considered present.
•
User defined:
Define user’s own pass criterion out of
0.01 to 0.1 ml. Once user defined is checked the +/-
are active to make a selection.
Figure 127
Display pass / no response : If active the result ( Pass
No Response ) will be displayed (Figure 127).
NOTE: This function cannot be deactivated if the Table
view is selected.
Figure 128
Verify pass : If active the reflex test will require two consecutive
Pass responses before moving to the next stimuli. When
inactive only one Pass is required (Figure 128).
Figure 129
AGC (Automatic gain control): If AGC is selected (Figure
129), the stimulus level will be reduced for small ear canal
volumes (< 2 ml) correspondingly to the values in Table 17.
NOTE: AGC can only be used on Ipsilateral stimuli.
For instance, when during the Tympanometry a 1.0 ml
ear volume is measured, the intensity of the stimuli during
the
Acoustic Reflex measurement will be reduced by
6 dB, with AGC active this results in a more accurate
reflex threshold measurement.
Table 17: AGC Active, Relative SPL Level Corrections
EAR CANAL VALUE RELATIVE SPL LEVEL
Ear Canal Value Relative SPL Level
2 ml (cc) 0 dB
1 ml (cc) -6 dB
0.5 ml (cc) -12 dB
0.2 ml (cc) -20 dB
0.1 ml (cc) -26 dB