Coverage Predictions Using Array2004; Cutview Sheets; Dv-Array1, Dv-Array2 Input Data - L-Acoustics dV-DOSC Operator's Manual

2.3 COVERAGE PREDICTIONS USING ARRAY2004

L-ACOUSTICS has developed a fast, easy-to-use prediction spreadsheet named ARRAY2004 that
operates under EXCEL. ARRAY2004 can predict coverage for flat, constant curvature or variable
curvature dV-DOSC arrays.
The first four worksheets represent vertical cut views (section elevations) of the audience in the XZ
plane and show a pseudo-3D representation of the intersection of the site angles for each enclosure
with the audience (these intersections are termed enclosure site angle impacts). The site angle for
each enclosure is calculated according to the user-input angles and all angles are referenced with
respect to the site angle of the top enclosure (which should be aimed at the rearmost part of the
audience). Cutview sheets are used to shape the vertical isocontour of either V-DOSC or dV-DOSC
arrays to match the audience geometry.
The H-ISOCONT sheet displays the horizontal isocontour of all defined arrays projected onto a plan
view of the audience area in the XY plane.
The SUBARC sheet is used to calculate delay taps for electronic delay processing of subwoofer arrays
The MTD XT SPACING sheet can be used to calculate optimum spacing for a given throw distance
for distributed sound reinforcement using MTD or XT coaxial loudspeakers.
The ROOM DIM sheet can be used to calculate XZ cutview parameters based on room
measurements. Room dimension calculation utilities are also available in the V-ARRAY1, V-ARRAY2,
dV-ARRAY1 and dV-ARRAY2 sheets.
In general, all input data should be entered into the cells in black. Results are displayed in red.
Note: In order to run ARRAY 2004, Macro Security should be set at "medium" in Excel, i.e., from the main
menu bar select: Tools / Macro / Security / Security Level = Medium
Note: A complete description of ARRAY2004 is beyond the scope of this manual. For further information,
participation in a dV-DOSC Training Seminar is recommended.

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.

dV-ARRAY1, dV-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 downstage pick point of dV-BUMP or dV-BUMP2 (hole
#0) 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 60° offstage (corresponding to the -6 dB coverage angle of dV-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, approximately 1.8 metres for standing). XZ
cells can be used to enter additional room features such as balcony profiles, stage/proscenium details,
FOH mix position, etc.
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dV-DOSC dV-SUB Manual V3.0 June 2005