L-Acoustics V-DOSC, Руководство оператора

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L-ACOUSTICS V-DOSC Manual Version 4 6/29/2005 Page 67 of 158
CUTVIEW SHEETS
Four cutview sheets are available: V-ARRAY1, V-ARRAY2, dV-ARRAY1, dV-ARRAY2. Cutview sheets
V-ARRAY1 and V-ARRAY2 are used to simulate V-DOSC arrays (including dV-DOSC downfill or upfill
enclosures) while dV-ARRAY1 and dV-ARRAY2 are used for simulating dV-DOSC.
V-ARRAY1, V-ARRAY2 Input Data
In AUDIENCE GEOMETRY cells, the designer enters the distances and elevations that define the
audience area according to a section view along the main zero degree axis of the system (Cutview 1).
The origin of the x-axis is referenced to the top rear corner of the top enclosure and the origin of the
z-axis is at floor level, i.e., the x-axis is distance or range along the desired array axis and the z-axis is
elevation above floor level. A second cutview can also be specified at an off-axis angle within the
coverage pattern of the array (Cutview 2). Typically the second cutview is taken at 45° offstage
(corresponding to the -6 dB coverage angle of V-DOSC) in order to confirm coverage throughout all
parts of the audience. The ear height relative to floor level should be entered in the “listening level”
cell (1.2 metres for a seated audience, 1.8 metres for standing).
Figure 45: Defining Cutview Dimensions
Although detailed blueprints are not necessarily required, the more information that can be obtained
on a venue for defining the audience geometry, the better. Typically, plan and section views are
available for most venues upon request. In situations where such documentation is not available, there
are a number of options: use a tape measure or laser range-finder (such as the Leica Disto Basic or
Hilti PD22) on site to perform dimensional measurements. Alternatively, L-ACOUSTICS has had good
results with the Bushnell Yardage Pro 600 for field measurements. Apart from being useful for defining
room geometry, this tool can also be used for determining delay time settings during system tuning,
for locating laser beams during array trim and angle adjustment (and on the golf course on days off!).
In some cases, tribune or balcony elevations can be determined by measuring individual step
depth/height and then counting the number of steps to calculate the section depth/elevation.
The ROOM DIM sheet is provided in ARRAY 2004 to assist in calculating cutview data from on site
measurements. Room dimension calculation utilities are also available in the V-ARRAY1, V-ARRAY2,
dV-ARRAY1 and dV-ARRAY2 sheets. (see Figure 46 for details).