34
en | Configuring the VARI
VARI-directional array
2018.06 | V1.3 |
Installation manual
Bosch Security Systems B.V.
Start
This is the horizontal distance from the front of the loudspeaker to the
position at which defined coverage is required, which will normally be the first
audience row. The distance is selectable in increments of 1
m. Select the
value closest to that applicable to the venue.
End
This is the horizontal distance from the front of the loudspeaker to the
furthest position at which defined coverage is required. This will normally be
the last audience row. The range available varies with the array type because
adding an extension unit to a base unit increases the effective coverage
distance of the array. The distance is selectable in increments of 1
m. Select
the value closest to that applicable to the venue.
In case of a hard (acoustically reflective) wall just behind the last row, the
contribution of the back wall echo may be reduced by using a smaller value for
the End parameter.
Rise
This should be left at 0.0
m if the audience area is horizontal. Many venues use
raked seating, however, and if this is the case, the height of the last row of the
seating should be entered here. Rise is adjustable in increments of 0.1
m.
Ear level
(Listening
height)
The height of the audience’s ears above floor level will be greater in a standing
venue than one with seats, and this parameter may be adjusted to allow for
this. (It may also be appropriate to adjust this to allow for audiences
predominantly comprising children!) The parameter is adjustable in
increments of 0.1
m.
6.4.2
Ranges of adjustment
Parameter
VARI-B/BH
VARI-B/BH+E
VARI-B/BH+E+E
Mounting Height*
0.5
m – 4.0
m (min. Ear level) / 2.0
m - 5.5
m (max. Ear
level)
Start
1.0
m - 5.0
m
End
10.0
m - 20.0
m
10.0
m - 32.0
m
10.0
m - 50.0
m
Rise**
0.0
m - 3.4
m
0.0
m - 5.3
m
0.0
m - 7.9
m
Listening Height (Ear level) 0.5
m - 2.0
m
*
The Mounting height range is dependent on the setting of the Ear level parameter.
** Maximum value of Rise is dependent on setting of End parameter and is limited by the
maximum angle of the slope, which is 10 degrees. Figure given is with End at maximum.
The alternative SPL display shows the same computed data as a simple graph of SPL at ear
level against distance.
