29
D-0126050 rev 1 -
270+ Operating Manual
4.8.4.2.
MASKING INTELLIGENCE
When performing audiometry (with or without masking), the instrument will automatically help by informing the
user that masking might be required and advise suggestions. These suggestions are based on the transducers
used and will also be shown in the temporary storage of the test.
SYMBOL
INTERPRETATION
Masking is active and efficient, no additional information is shown on screen.
?
Masking is currently switched off, but advisable.
!
Masking is active but considered too high compared to the test signal level.
^
Masking is active. However, the masking level is judged to be too little. It is recommended to
increase the masking intensity until the
^
disappears.
v
Masking is active. However, the masking level is judged to be too high. It is recommended to
decrease the masking intensity until the
v
disappears.
4.8.4.3.
MANUAL MASKING
When the masking channel is active, the LED ring around the Channel 2 rotary control will illuminate white. To
activate masking, select the
MASK
button.
Active manual masking is started by selecting
F2
(
MASK
). In this case, the user needs to increase the masking
level himself, using the Channel 2 rotary control.
Pressing
F3
(
TRACKED
) activates tracked masking, which means that the control of the test signal level
(Channel 1 rotary control) also increases the loudness of the masking signal. The masking signal start level
can be set by using the Channel 2 rotary control.
Pressing
F1
(
NONE
) will deactivate masking again. Using the option
CANCEL
will return to the previous test
screen.
Please note:
Masking the bone conduction can be performed by using either headphones or insert
transducers.
Summary of Contents for 270+
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