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IN-1
%
%ALcons, 3-7
A
acoustical treatment, 2-7
acoustics, 2-6
AHJ, 7-2
Amplifiers, 4-3
audibility, 5-2, 7-2
audio riser interface modules, 4-3
B
background noise, 3-3, 5-3
C
Ceiling height, 2-14
CIS, 3-6, 7-2
clipping, 7-2
combination system, 7-2
command center, 4-3, 7-2
Common Intelligibility Scale (CIS), 3-6
constant voltage, 7-2
coverage angle, 7-2
critical polar angle, 2-13, 2-14, 7-2
D
dB and distance chart, 2-9
decibel, 7-2
Decibel, 2-2
decibels, adding, 2-3
design method, 6-2
digital riser, 7-2
directivity factor, 2-11
directivity factor, 7-2
distortion, 3-5, 7-3
distributed speaker, 3-9
E
echo, 7-3
emergency voice evacuation systems, 1-1
emergency voice/alarm communications
system, 4-2
equal loudness curves, 2-4
F
fiber optic riser, 7-3
fire alarm audio systems, 4-3
frequency, 7-3
G
Glossary of Terms, 7-1
I
intelligibility, 3-2, 5-4, 7-3
Intelligibility, 1-1
intelligibility, certification, 5-5
inverse square law, 2-9, 7-3
M
Microphone technique, 3-5
N
NACs, 4-3
NFPA, 7-3
O
Ohm’s Law, 2-2, 7-3
Overview, 1-1
P
percent ALcons, 3-7
phon, 7-3
phonetically balanced word scores, 3-7
polar plots, 2-10, 7-3
power ratings, 2-15
publications, related, v
R
RASTI, 3-7
regulatory issues, 5-1
related publications, v
reverberation, 2-6, 3-4, 7-3
Reverberation, estimating times, 2-7
riser, 4-3, 7-3
riser, analog, 4-3
riser, digital, 4-3
riser, fiber optic, 4-3
Robinson and Dadson equal loudness
curves, 2-4
room design calculator, 6-4
S
Sabine and Eyring equations, 2-7
sensitivity, 7-3
signal-to-noise ratio, increasing, 2-8
sound pressure levels (SPL), 7-3
Sound Pressure Levels (SPL), 2-2
speaker circuits, 4-4
speaker coverage, 2-12
Index