1696 Index
1138–1139
ASTM E336-97 72
Asymmetric-directivity horns
loudspeakers 613
Asynchronous connections
digital audio interfacing and net-
works 1461
Atmospheric absorption 204
designing for speech intelligibil-
ity 1401
Attack time
consoles 900
Attenuation
fiber optics 458, 477, 479
wire and cable 432
Attenuation coefficient
fiber optics 458
Attenuation in fiber
fiber optics 459
Attenuation measurement
fiber optics 461
Attenuation of Maximum
acoustics for auditoriums and
concert halls 181
Attenuation of noise in ducts
acoustical noise control 91
Attenuation of sound indoors
sound system design 1248
Attenuation with increasing dis-
tance
sound system design 1240
Attenuator
fiber optics 479
Attenuator pads
consoles 865
Attenuators
attenuator networks 767
automated faders 779
automatic 779
balanced attenuator 767
balanced bridged T 774
balanced ladder 776
balanced T pad 773
bridged T pad 773
combining networks 772
distortion 767
dividing networks 772
feedback-type volume control
778
field-effect transistor attenuators
779
H pad 773
impedance 770
impedance matching 769
impedance mismatch ratio 770
insertion loss 769, 773
K factors for calculating attenua-
tor loss 768
K value 768
L pads 771
ladder 776
ladder networks 776
ladder potentiometers 776
light-dependent attenuator
(LDA) 778
loss 769
microphones 581
minimum-loss pad 769
mixer 780
O type 775
pi or delta attenuator 774
summing amplifiers 781
T attenuators 773
transformer isolated 767
types of attenuators 771
U type 775
unbalanced pad 767
unity-gain current-summing am-
plifiers 781
VI meters 1000
voltage-controlled amplifier
(VCA) 779
volume and loudness controls
776
Atwater Kent 16
Audible frequency range
units of measurement 1679
Audible spectrum
fundamentals of audio and
acoustics 27
Audience absorption
acoustics for auditoriums and
concert halls 186
Audio and video teleconferencing
sound system design 1329
Audio archival
message repeaters and evacua-
tion systems 1527
Audio codecs
optical disc formats 1152Audio cooling tube
heatsinks 369
Audio dB meter
integrated circuits 348
Audio encoding
psychoacoustics 48
Audio Engineering Society 13,
637
Audio frequency range
units of measurement 1666
Audio over Ethernet
consoles 989
Audio path
consoles 855
Audio program material
fundamentals of audio and
acoustics 35
Audio signal transmission via com-
puter networks
sound system design 1333
Audio spectrum
units of measurement 1678
Audio standards
units of measurement 1663
Audio transformers
air gap 279–280
auto-transformer 280
balanced input 297–298
balanced input stages 302
balanced output 298
bandwidth 289
basics 275
B-H loop 278–279
bi-directional reflection of im-
pedances 287
bi-filar winding 281
bi-filar wound 286
bobbin 282
boosting 280
bucking 280
buzz 296
cable capacitance 289
capacitance 282
center tapped 276
CMRR 283, 290–291
coil inductance 278
common mode rejection ratio
290
common-mode noise 283, 290
common-mode rejection 302