1772 Index
Ultra capacitor characteristics
power supplies 691
Ultra capacitor UPS
power supplies 690
Ultrasound
message repeaters and evacua-
tion systems 1524
Unbalanced
microphones 521
Unbalanced cable
grounding and interfacing 1202
Unbalanced electrical interface
digital audio interfacing and net-
works 1483
Unbalanced input
audio transformers 297–298
Unbalanced interface
audio transformers 296
grounding and interfacing 1213
Unbalanced line
sound system design 1296
Unbalanced output
audio transformers 297–298
Unbalanced pad 767
Under water loudspeakers 605
Underhung coil
loudspeakers 607
UniCam Connector System tool
fiber optics 474
Unicast bundles
digital audio interfacing and net-
works 1506
Unidirectional microphone 493,
495, 498, 506
Units of Measurement 1647
Units of measurement 1647
%Alcons 1659
abbreviations 1667
absorption coefficient 1660
acceleration. 1652
amplitude 1652
audible frequency range 1679
audio frequency range 1666
audio spectrum 1678
audio standards 1663
average absorption coefficient
1660
capacitance (C) 1650
conductance 1650
critical distance 1658
critical distance modifier (M)
1659
current (I) 1648
decibel (dB) 1655
derived quantities in physics
1648
directivity factor (Q) 1660
displacement 1651
electric capacitance (C) 1650
electric charge (Q) 1650
electric conductance 1650
electric inductance 1651
electric potential difference (V)
1650
electric resistance (R) 1650
electrical power required (EPR)
1660
energy (E) 1649
equivalent acoustic distance
(EAD) 1658
equivalent input noise (EIN)
1661
feedback stability margin (FSM)
1659
force (F) 1650
frequency (f) 1651
fundamental quantities in phys-
ics 1647
Greek alphabet 1663
inductance 1651
ISO numbers 1662
kinetic energy (T) 1649
Kirchhoff’s current law 1654
Kirchhoff’s laws 1653
Kirchhoff’s voltage law (KVL)
1653
length (l) 1648
limiting distance 1658
loudspeaker sensitivity 1661
luminous flux 1651
luminous flux density 1651
luminous intensity (IL) 1649
magnetic flux 1651
magnetic flux density 1651
mass (M) 1648
max program level 1661
mean-free path (MFP) 1660
molecular substance (n) 1649
multiple and submultiple prefix-
es 1647needed acoustic gain (NAG)
1659
number of open microphones
(NOM) 1659
Ohm’s law 1654
phase 1652
phase angle 1649, 1652
phase difference 1652
phase shift 1652
phase velocity 1652
potential acoustic gain (PAG)
1659
potential energy (U) 1649
power (W) 1650
pressure 1650
radio frequency spectrum 1654
resistance 1650
SI system 1647
signal delay 1662
signal to noise ratio (SNR)
1660
solid angle (A) 1649
sound intensity 1651
sound pressure level (SPL)
1657, 1660
sound system quantities 1658
speed/velocity 1651
surface area and volume equa-
tions 1678
symbol prefixes 1647
temperature (T) 1648, 1652
thermal noise 1661
Thevenin’s theorem 1653
time (t) 1648
total absorption 1661
U.S. to SI units conversion fac-
tors 1666
wavelength (M) 1652
weight 1652
Unity
gain structure 1225
Unity amplification method
gain structure 1228
Unity gain Sallen-Key filter
filters and equalizers 795
Unity-gain current-summing ampli-
fiers 781
Universal Disc Format (UDF)
Bridge
optical disc formats 1146