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3.
Operation
Setting Up.
The
equipment should
be
set
up as indicated in
Fig.
3.1. The microphone
cartridge
is
screwed
onto the
end
of the
extension cable (AO
0059)
and
the
cable
is
screwed
onto the
Sound
Level Meter.
Fig.
3.1.
The Hearing
Aid
Test Box set up for calibration of the
sound
pressure level with the
condenser
microphone
and
Precision
Sound
Level
Meter.
21
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