Operating Instructions MA 53
Geba_MA53_e_13a.doc
12 851 430/3 11/11
3.3.2 The display of the MA 53
The large backlighted graphical LCD-
Display
of the MA 53 shows all actual
settings and test results. The display area is
split with a line into an upper or main area
and a lower or advanced area (see picture
9). The main area shows the individual
settings for the left channel on the left and the right channel on the right.
General settings which affect both channels are displayed in the middle. The
example picture 9 shows a typical setting for a BC- threshold test. The left
channel is bone conduction with 70 dB
HL
, tone and tracking function
enabled. The right channel is set to 90 dB
HL
narrow band noise with air
conduction for masking. The test frequency is 1500 Hz and the test signal is
a warble tone. The lower section of the display shows that the talk over
microphone button
or
is pressed and the audiologist talks to the patient
with 70 dBHL. The HL in the upper row before 1500 Hz indicates that the
current measurement is stored as Hearing Level (threshold) test.
Picture 10 shows the display for a speech
test with speech test material from tape
or CD of the left ear and masking of the
opposite ear. The left part of the LCD-
display
shows the settings for the left
channel:
level = 60 dBHL, receiver = AC, signal = tape/CD.
The middle of the LCD-display
shows the actual test and the result:
MS stands for multi syllable speech test,
speech discrimination = 60%, correct words = 6, wrong words = 4.
The right part of the LCD-display
shows the setting for the right channel:
level = 60 dBHL, receiver = AC, signal = speech-noise (masking).
The LCD-display
has an energy saver function: the backlight of the display is
automatically switched out after approximately three minutes. Any action
with the MA 53 such as pressing a button or turning the knobs switches the
backlight immediately on again.
Picture 9 MA 53 display for BC-test
Picture 10 MA 53 display for speech - test
Содержание MA 53
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