Obstacles
Direction estimation is based on measurement of phase dierences
between microphones. If the unit is placed in such a way that large
portions of the signal can be reected back towards the unit, this
will inuence the phase between the microphones and cause wrong
direction estimation. Optimal performance is obtained when the unit has
a clear path to all directions.
Figure 1 Microphone Mounting Guidance
4.2.3 Microphone Cable Precautions
When the microphone bracket is fastened on the bulkhead, let the
cables do a one-turn service-loop before entering the microphone
housing. The loop will ensure that the eect of the vibration shock
absorber is not impaired. This is necessary to reduce ship-borne
vibrations reaching the sensitive microphone elements.
4.2.4 Compass safety distance
All units must be mounted with a distance of 70 cm from the vessel’s
standard compass and steering compass.
Title
Size
Date
Sheet
Drawn by
Rev.
1/1 1.00
Jesper Sørensen
WHEELHOUSE
MAST/round objects: Mast diameter
0.2m, Distance 0.5m
OBJECTS: Distance min. 10m or 2 times
width of objects whatever the longest.
TYPHOON: Do not place Microphone in front of
ships typhoon. Side distance min. 6m
OBJECTS: Do not place Microphone
close to big and reflective objects.
MICROPHONE Recommended
locations
MICROPHONE Not allowed
locations
DECK
6M
Typhoon
Mast or round objects
0,5M
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