Norsonic nor1217, Instruction Manual

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5 Norsonic Nor1217
Instruction Manual
Technical description
The outdoor microphone Nor1217 is based on a ½”
working standard microphone type WS2F according
to IEC 61094-4.
Two types of microphones is tested and is recom-
mended;
- Nor1225, a free field microphone requiring 200V
polarisation voltage.
- Nor1227, a free field self polarised microphone.
Both microphones have a nominal sensitivity of 50 mV/P
a. However, each microphone is individual calibrated
and may differ slightly from this value.
The upper part of the Nor1217 consists of wind-
screen, rain hood, dust mesh and birdspike and pro-
tects the microphone from rain, snow, dust and insects.
Both the rain hood and the dust mesh are made of a
water-repellent fabric open for the sound. The sound
is reaching the microphone through nine slots placed
equidistantly around the circumference of the circular
body of the upper part. The mechanical part with the
birdspike is also important for the directional response
of the complete microphone system.
The upper part may be removed as one unit and will
thus give easy access to the microphone cartridge for
testing and calibration.
Birdspike
Windscreen
Microphone cartridge
Rain hood
Dust mesh
Preamplifier
Plate for type and
serial number
Base
Unscrew the
upper part
here!
Upper part