X
-Array Install™ Xi-1152/94 Loudspeaker System
X-Array Install™ Xi-1152/94 Loudspeaker System
6
Figure 3—Beamwidth
The beamwidth of the system, (i.e., the in-
cluded horizontal and vertical coverage
angles at the 6-dB down point) was measured
with a full spherical measurement system as
described in "Polar Response."
Figure 4—Directivity
The directivity index, D
i
, and directivity fac-
tor, R
θ
(Q), of the system were measured
with a full spherical measurement system as
described for the "Polar Response."
Figure 5—Distortion
Distortion for the system was measured on
axis in the farfield in an anechoic environ-
ment with an input signal that would result
in a sound-pressure level of 115 dB at one
meter. The Dx34 digital electronic unit was
used to provide the necessary crossover fil-
ters, equalization and time delay. A fre-
quency spectrum typical of close-mic’d rock
music was employed. The sound-pressure
level was normalized for an equivalent one-
meter distance. Plots of second and third
harmonic distortion are shown referenced to
the fundamental.
