Audiophony PA BM-Control Посібник користувача - Сторінка 11
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AUDIOPHONY PUBLIC ADDRESS
5 - Measerement functions
(-20db) Measuring range for background noise
Increases the sensitivity of the device. Used to detect stray magnetic fields or a
magnetic pollution zone. We advise to carry out your measurements with a maximum
of devices in operation (neon, sound sources,
transformers, etc) to reproduce as well as possible a normal use of the equipped place
and to evaluate in real condition the zones likely to be polluted .
This feature also allows you to determine the crosstalk of
their
privacy.
Measurement range from -43 to -12 dB.
(0 dB) Measuring range for magnetic field strength
Broadband measurement range to control the field strength that the induction loop
emits.
Filter A
Evaluates the values measured on the basis of the listening curve of human ears.
Filter Norm
Evaluates all the values measured in the same way on the basis of their physical units.
5.1
Using the meter
Before starting any calibration, be sure to determine a reference point in the loop
(usually in the middle of the magnetic loop being placed). Then we advise you to
determine a minimum of 6 measurement points.
BM-Control incorporates a receiver
coil placed vertically in the unit, so
it is important to maintain the unit
upright throughout the operation.
Respect also the distance between
the ground and the meter, it will
depend on the application of the
loop. The meter should be held at
head height (where the future user's
hearing instrument will be).
For example, for standing use, hold
the meter at approximately 1m70. For
seated use, approximately 1m20.
screen, electrical rooms and
loops
to
English
test
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