otometrics Madsen ZODIAC 901, Руководство пользователя

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*In Version 3. x and later, this function is called Press.C. (Pressure Con-
trol) and is extended to: Manual, Auto, MEP +0, +5, +10, +15, +20, +25,
–25, –20, –15, –10, –5 daPa.
4.3.2 FAST SCREENING
Reflex This test mode permits automatic reflex threshold search at up to 16 dif-
ferent levels. Data from all stimulus frequencies (500, 1000, 2000 and
4000 Hz tone, plus White Noise if Contra has already been selected) is
memorized and displayed in tabular form on the right of the screen. The
display is organized very differently from that used for Threshold Reflex
(see §4.3.1). If the default has been modified using ZODICON
TM
soft-
ware, the x -axis, pre-stimulation delay, stimulation time and post-
stimulation delay may be different from those indicated.
NOTE NOTE that it is not possible to export any graphic data from this test
mode, i.e. only measured threshold values may be printed out or
transmitted via the data interface.
Softkey 2 Press Main Menu and use Softkey 5 to select Advanced Mode. Press
Threshold to display the Threshold Menu. Press Softkey 2 from the
Threshold Menu to access the screen shown in Fig.4.21.
Contra
Note that, when Contra is selected, the type of phone is displayed as
well as White Noise stimulus, if selected.
Softkey 1
Press Softkey 1 to set the desired stimulus type. Press it repeatedly, or
keep it pressed and turn the Rotary Knob left or right. The stimuli avail-
able are: tone at 500, 1000, 2000, and 4000 Hz, plus White Noise if Contra
has been selected.
Softkey 2 Softkey 2 starts or stops the test. The pushkey on the probe may also be
used to do this. The ZODIAC 901 will conduct three tests automatically
using the elected stimulus at 70 dB, 80 dB and 90 dB in turn. If it finds a
reflex, it will show its threshold level in the panel in the right-hand part
of the display, and stop further testing. If not, it will display NR (= No
Reflex). The number of tests conducted in turn, the step size from each
step to the next, etc., may be changed using Setup. The tests may be re-
peated with each of the available stimuli in turn.
Operation Manual 49
GN Otometrics MANUAL MODE Chap. 4
ZODIAC 901 Middle-Ear Analyzer
THRESHOLD TESTING
4.3
Fig.4.21
Threshold Fast Screening