Index 1691ditioning (HVAC) 89
high-loss frame walls 74
homemade acoustical doors 83
homemade acoustical windows
86
identification of HVAC noise
90
isolation mount systems 80
isolation systems 74, 89
location of HVAC equipment
90
low-frequency response 69
noise criteria 67
percentile levels 70
plenum noise attenuators 92
proprietary acoustical doors 83
proprietary acoustical windows
86
proprietary silencers 93
raised slab or jack-up system 81
room-within-a-room 82
single-number STC rating 73
site noise survey 69
site selection 69
sound barrier 71
sound level meter 67, 70
sound lock corridor 83
STC number 72
TEF 20 67
TEF 25 70
transmission loss 71
transmission loss of a compound
barrier 87
transmission loss of single glass
plates 84
transmission loss of spaced glass
plates 85
tuned stub noise attenuator 92
vibration isolation 90
wall caulking 77
wall construction 74
windows 84
Acoustical plasters
acoustical treatment for indoor
areas 107
Acoustical Society of America 12
Acoustical testing
test and measurement 1607
Acoustical tiles
acoustical treatment for indoor
areas 107
Acoustical treatment for indoor ar-
eas
absorption 97
absorption coefficients of build-
ing materials and absorbers
115
absorption ratings 101
absorption testing 98
acoustical absorption 97
acoustical baffles 108
acoustical banners 109
acoustical diffusion 115
acoustical plasters 107
acoustical tiles 107
applications of diffusion 120
bass traps 110, 113
carpet 107
chairs absorption 108
closed cell foams 105
diaphragmatic absorbers 109
diffraction 120
diffuser testing 117
diffusion 115, 117
digital room correction (DRC)
121
discrete absorbers 108
draperies 108
fire safety codes 121
glass fiber panel 103
gypsum wallboard (GWB) 111
Helmholtz resonators 111
impact of absorption 115
impedance tube testing methods
100
medium density fiber panels
103
melamine foam panels 106
membrane absorbers 109
microperforated materials 112
mineral fiber board 104
natural cotton panels 105
Noise Reduction Coefficient
(NRC) 101
nonreverberant spaces 114
numerical diffusers 118
open-cell foams 105
people absorption 108
perforated coverings 105
perforated membrane absorber111
polyurethane foam panels 106
porous absorbers 102
Q factor 110
quadratic residue diffuser (QRD)
118
random diffusers 119
reflection 120
refraction 120
resonant absorbers 109
reverberation chamber 98
reverberation time 114
RT equations 114
Sabine absorption coefficient
101
scattering 117
scattering coefficients 118
Schroeder diffusers 115
SONEX 106
Sound Absorption Average
(SAA) 101
Acoustics
absorption of sound by air 205
atmospheric absorption 204
atmospheric effects outdoors
203
impulse response 232
outdoor sound
distributed loudspeaker sys-
tems 210
effects of air temperature 204
effects of atmospheric absorp-
tion of acoustical energy 204
effects of relative humidity
204
effects of temperature inver-
sion gradient 204
Acoustics for auditoriums and con-
cert halls
%Alcons 157, 159
absorbed sound power 151
Acoustic Control System (ACS)
193
Active Field Control System
(AFC) 194
Alcons 156–157, 159
ambiophony 191
angular range of uniform irradia-
tion 181
architectural acoustics 190