Handbook for Sound Engineers

Fundamentals and Units of Measurement 1663

48.7 Greek Alphabet

The Greek alphabet plays a major role in the language

of engineering and sound. Table 48-5 shows the Greek

alphabet and the terms that are commonly symbolized

by it.

48.8 Audio Standards

Audio standards are defined by the and the Audio Engi-

neering Society (AES), Table 48-6 and International

Electrotechnical Commission (IEC) Table 48-7.

9.00 9.00 8.912509312

9.50 9.440608688

Table 48-5. Greek Alphabet

Name Upper Case Lower Case

alpha $Dabsorption factor, angles, angular

acceleration, attenuation con-

stant, common-base current

amplification factor, deviation of

state parameter, temperature

coefficient of linear expansion,

temperature coefficient of resis-

tance, thermal expansion coeffi-

cient, thermal diffusivity

beta % ß angles, common-emitter current

amplification factor, flux density,

phase constant, wavelength con-

stant

gamma *Jelectrical conductivity, Grue-

neisen parameter

delta 'decrement

increment

Gangles, damping coefficient

(decay constant), decrement,

increment, secondary-emission

ratio

epsilon (electric field

intensity

Hcapacitivity, dielectric coeffi-
cient, electron energy, emissiv-
ity, permittivity, base of natural
logarithms (2.71828)
zeta =]chemical potential, dielectric sus-
ceptibility (intrinsic capaci-
tance), efficiency, hysteresis,
intrinsic impedance of a medium,
intrinsic standoff ratio
eta +K
theta 4 angles, ther-
mal resistance

T angle of rotation, angles, angular
phase displacement, reluctance,
transit angle
iota ,L
kappa .coupling
coefficient

N susceptibility

lambda /Oline density of charge, per-
meance, photosensitivity, wave-
length

Table 48-4. Internationally Preferred ISO Numbers

(Continued)

(^1) e oct. (^1) e oct. (^1) e oct. (^1) e oct. (^2) e oct. (^1) e oct.
40 ser. 20 ser. 10 ser. 61 e
ser.
5
ser.
31 e
ser.
Exact value
mu 0 μamplification factor, magnetic
permeability, micron, mobility,
permeability, prefix micro
nu 1Qreluctivity
xi ;[
omicron 2R
pi 3SPeltier coefficient, ratio of cir-
cumference to diameter (3.1416)
rho P p reflection coefficient, reflection
factor, resistivity, volume density
of electric charge
sigma 6 summation Vconductivity, Stefan-Boltzmann
constant, surface density of
charge
tau T period Wpropagation constant, Thomson
coefficient, time constant,
time-phase displacement, trans-
mission factor
upsilon 8 admittance X
phi )magnetic flux,
radiant flux
Iangles, coefficient of perfor-
mance, contact potential, mag-
netic flux, phase angle, phase
displacement
chi X angles
psi <angles \dielectric flux, displacement flux,
phase difference
omega :resistance Zangular frequency, angular veloc-
ity, solid angle
Table 48-6. AES Standards
Standards and Recommended Practices, Issued Jan 2007
AES2-1984:
(r2003)
AES recommended practice—Specification of
loudspeaker components used in professional
audio and sound reinforcement
AES3-2003: AES recommended practice for digital audio
engineering—Serial transmission format for
two-channel linearly represented digital audio
data (Revision of AES3-1992, including subse-
quent amendments)
AES5-2003: AES recommended practice for professional
digital audio—Preferred sampling frequencies
for applications employing pulse-code modula-
tion (revision of AES5-1997)
AES6-1982:
(r2003)
Method for measurement of weighted peak
flutter of sound recording and reproducing
equipment
Table 48-5. Greek Alphabet (Continued)
Name Upper Case Lower Case