HK Audio CDR 210 F - Manual (Page 58)

Manual
COHEDRA
® & COHEDRA ® Compact
is computed during the optimization procedure.
The default value is 200 points.
Note:
Deactivating Area Speakers only and Neighboring
angles only increases the number of COHEDRA
®
configurations to be analyzed during the
optimization process. This prolongs computing
time, as does selecting a greater number of
calculation points!
When Fit to line is selected in the Measure box,
the array's alignment is optimized to fit the
envelope that you defined by drawing in the red
line. Conversely, if Smooth Area is selected, the
array's alignment is optimized to ensure uniform,
smoothed dispersion within the given audience
area.
The Fit line box indicates the starting point X1 and
the end point X2 of the envelope that you defined
by drawing in the red line. Delta dB indicates the
difference in sound level between the starting and
end points. In the box above the Begin Calculation
button, you'll first see indicated the number of the
audience area for which the alignment is being
optimized, and then the number of configurations
to be analyzed in this optimization process.
Click the Begin Calculation button to initiate
the optimization process. Throughout you'll see
indicated in the display above the button the
number of tested configurations, the progress so
far in percentage values, the best optimization
value so far, and the number of configurations
that have achieved this value. In the box at the
right of the optimization window, you'll see a view
of the configuration currently being analyzed in
the optimization procedure. Deactivate the Show
Setup option located above this box to hide the
configurations view. If you want to temporarily halt
the optimization process, click the Pause button.
Click Continue Calc. to resume the optimization
process.
Once the optimization process has been
concluded, the Top configurations selection box
shows the three configurations that deliver the
best optimization results, as well as the original
configuration; that is, your manually configured
array. You may select these configurations
successively in the Top configurations box in order
to compare them. Each selected configuration is
shown in the view on the right of the optimization
window. You'll see the selected configuration's
alignment in the side view shown on the Setup
panel. You'll also see that the diagram at the lower
edge of this panel continues to show the sound
level achieved in the given audience area using this
configuration.
After you have selected one of the configurations
in the optimization window, click the Accept
Selected button to accept this configuration for
the given project. Otherwise, click Cancel to close
the optimization window and retain your initial
configuration.
When you have finished aligning enclosures, click
on the button with the open lock to secure the
configured array against changes. The lock on this
button closes. To unlock the configuration, simply
click the button again so that the lock opens.
5.5 Viewing the
Sound Level Envelope
Once enclosures have been aligned, you can click
Continuous at the top center of the screen to view
the continuous level within the audience area in a
diagram at the lower edge of the screen. Click the
other audience areas in the side view to see their
sound level envelopes. To view the peak sound
level within the audience area, click Peak at the top
center of the screen. Like the continuous sound
level simulation, the peak simulation also uses a
broadband signal covering the entire frequency
range.
Click Detailed at the top center of the screen to
obtain a view of relative sound dispersion with an
adjustable frequency and adjustable bandwidth
for the currently selected audience area. In the
selection box on the right of Peak, you can enter the
desired bandwidth from a third of an octave, one
octave, three octaves or broadband. In the selection
box on the right of the bandwidth setting, you can
choose the desired frequency within a range of 100
hertz to 12,500 hertz in steps of thirds.
Note:
You can use a bandwidth of a third of an octave or
one octave to view narrow-band spatial interference.
Figure 16: Setup optimization