HK Audio CDR 210 F - Manual (Page 49)

49
E
1 Introduction
CAPS (Cohedra Acoustic Prediction Software)
providesthe tools and support you need to plan
and configure HK AUDIO
® COHEDRA ® line arrays.
To this end, it features many useful functions and
handlesintuitively. Despite its ease of use, please
take thetime to read this manual and learn to make
themost of all its features so you can achieve the
best possible audio results every time you deploy a
COHEDRA
® system.
1.1 Acoustic Simulation
for Line Arrays
An acoustic simulation serves to predict
expectedaudio results. With its capability
of forecasting howwell a proposed sound
reinforcement solution willwork in practice, it is
very helpful in masteringsound reinforcement
challenges. Best of all, it letsyou perfect the sound
system before you actually setit up: The simulation
helps detect errors beforehand;sparing you the
considerable extra effort it takes tocorrect flaws
after the system is up. For this reason, acoustic
simulations have become a standard toolfor fixed
installations and are used in many projects.
Traditionally, acoustic simulations have been
employedless frequently for mobile sound
reinforcement, andthen primarily for larger projects.
This is changing withthe arrival of line arrays in the
sound reinforcementarena. Figures 1 and 2 illustrate
the reason for this.
Figure 1 depicts a simulation of direct sound propa-
gation using an HK AUDIO
® RT 112 F enclosure
as a source with spherical reflectivity. Although at
25°,this enclosure’s vertical angle of radiation is
quitesmall, it throws sound energy a considerable
distanceacross a relatively large field of the
audience area. A minor change in the enclosure’s
vertical angle (3°)would not have a major impact in
changing levels within the audience area.
Figure 2, in turn, depicts a simulation of direct
sound propagation using a COHEDRA
® CDR 208
enclosure as a source with spherical reflectivity.
Because the radiated sound wave does not expand
much vertically, the enclosure throws sound
energyacross a narrowly defined field of the
audience area.A minor change in the enclosure’s
vertical anglewould shift this very narrowly defined
field so thatlisteners are no longer supplied with
sound energy. Sound energy may also be directed
towards walls, which produces undesirable
reflections.
Hence, achieving a good audio result with a
line array requires very careful configuration
and alignment. To help you determine the best
possibleconfiguration and alignment of the
COHEDRA
® Line Array before you set up or install
it, HK AUDIO ® offers the CAPS software and a
DLL for the simulationprogram EASE 4.0. EASE 4.0
takes into account thegiven acoustical conditions to
calculate all relevantacoustical parameters such as
direct and overallsound levels, delay times, clarity,
speech intelligibility, and so forth, as well as to
create auralizations. EASE 4.0 is commonly used
to plan COHEDRA
® system configurations for fixed
installations and larger mobile sound reinforcement
projects.
Figure 1: Simulation of a RT 112 F’s directivity
Figure 2: Simulation of a CDR 208’s directivity
COHEDRA
®
Setups with CAPS