1692 Index
articulation loss 156
assisted resonance 192
attenuation of maximum 181
audience absorption 186
auditoriums, congress centers
163
average sound energy density
151
axis-near reflection areas 179
balconies 173
bass ratio 151
broadband sound absorbers 189
CARMEN 196
ceilings 171
center time 154
circles 173
circular effect 179
clarity measure C80 159
classical concert halls 164
critical distance 151
curved boundary surfaces 170
definition measure C50 154,
158
degree of definition D 154
degree of diffusivity d 180
diffuse reflection 178
diffusivity ratio 181
directed (local) reflection 178
directional sound reflection 181
displacement of maximum 181
dissipation coefficient 183
echo criterion 154
eigenfrequencies 192
electronic architecture
190–191
elliptical effect 180
energy criteria 152
equivalent sound absorption area
165
ERES 191
flow resistance 184
galleries 173
general concert halls 164
geometrical reflection 178
Helmholz resonators 185, 192
hyperbolic effect 180
intelligibility of sentences 157
intelligibility of words 157
Interaural Cross-Correlation Co-
efficient (IACC) 153LARES System 194
lateral efficiency LE 161
logatoms 157
mean reverberation time 149
modulation reduction factor
m(F) 155
modulation transmission func-
tion (MTF) 155
multi-channel reverberation
(MCR) 192
multi-genre theaters 163
multi-purpose halls 163
near field 151
opera houses 163
orchestra pit 177
panel resonances 184
parabolic effect 180
performance zone 168
planning fundamentals 162
platform consideration in concert
halls 175
polygon ground plan 170
porous materials 184
RASTI 159
register balance measure BR
162
reverberance measure H 161
Reverberation on Demand Sys-
tem (RODS) 193
reverberation radius 151
reverberation time (RT60) 148,
165
reverberation time duration 148
room acoustics 190
room shape 167
room volume 165
room-acoustical criteria 147
room-acoustical planning 164
rooms with variable acoustics
164
scattering coefficient s 180
show theaters 164
site lines 173
sloping of tiers 173
smooth curved surfaces 179
sound absorbers 183
sound absorption coefficient
149, 183
sound coloration measures 160
sound delay systems 191sound energy component 152
sound form 165
sound pressure level 153
sound reflection coefficient 183
sound-field-proportionate fac-
tors 152
spatial impression measure R
160
specific flow resistance 184
Speech Transmission Index
(STI) 155
spoken-drama theaters 163
sports halls, gymnasiums 164
strength measure G 153
structure coefficient s 184
subjective intelligibility tests
156
System for Improved Acoustic
Performance 194
task of variable acoustics 189
time criteria 148
transmission coefficient 183
trapezoidal ground plan 169
travel-time-based reverbera-
tion-time enhancing systems
191
variable acoustics 188
vario-acoustics 188
Active acoustics
virtual systems 1455
Active balanced inputs
sound system design 1305
Active balanced line driver
integrated circuits 360
Active balanced line receiver
integrated circuits 360
Active Field Control System (AFC)
acoustics for auditoriums and
concert halls 194
Active filters 711
filters and equalizers 793
Active microphone preamplifier
integrated circuits 350
Active release time constants
consoles 903
Actuate time
relays 374
AD524
integrated circuits 350
AD636