1672 Chapter 48
intelligent power management system IPM¥
intensity level LI
interaural cross-correlation IACC
interaural cross-correlation coefficient IACC
interaural intensity difference IID
interaural level difference ILD
interaural phase difference IPD
interaural time difference ITD
intermediate frequency IF
intermodulation IM
intermodulation distortion IM or IMD
international building code IBC
International Communication Industries
AssociationICIAInternational Electrotechnical Commission IEC
International Electrotechnical Engineers IEEE
International Organization for Standardization ISO
International Radio Consultative Committee CCIR
International Standard Recording Code ISRC
International Standards Organization ISO
International Telecommunication Union ITU
Internet Engineering Task Force IETF
internet group management protocol IGMP
internet protocol IP
internet service provider ISP
interrupted feedback (foldback) IFB
inverse discrete Fourier transform IDFT
IP Over Cable Data Network IPCDN
ISDN digital subscriber line IDSL
Japanese Standards Association JSA
Joint Photographic Experts Group JPEG
joule J
joule per kelvin J/K
junction field effect transistor JFET
just noticeable difference JND
kelvin K
kilocycle per second kHz
kiloelectronvolt keV
kilogauss kG
kilogram kg
kilogram-force kgf
kilohertz kHz
kilohm k:
kilojoule kJ
kilometer km
kilometer per hour km/hTable 48-9. Recommended Abbreviations
Unit or Term Symbol or
Abbreviationkilovar kvar
kilovolt (1000 volts) kV
kilovolt-ampere kVA
kilowatt kW
kilowatthour kWh
knot kn
lambert L
large area systems LAS
large-scale hybrid integration LSHI
large-scale integration LSI
lateral efficiency LE
lateral fraction LF
leadership in energy and environmental design LEED
least significant bit LSB
left, center, right, surrounds LCRS
light amplification by stimulated emission of
radiationLASERlight dependent resistor LDR
light emitting diode LED
linear time invariant LTI
liquid crystal display LCD
liquid crystal on silicon LCoS
listening environment diagnostic recording LEDR
liter l
liter per second l/s
live end–dead end LEDE
local area network LAN
local exchange carrier LEC
local multipoint distribution service LMDS
logarithm log
logarithm, natural ln
long play LP
look up table LUT
loudspeaker sensitivity Lsens
low frequency LF
low frequency effects LFE
low power radio services LPRS
low-frequency effects LFE
low-pass filter LPF
lower sideband LSB
lumen lm
lumen per square foot lm/ft^2
lumen per square meter lm/m^2
lumen per watt lm/W
lumen second lm.s
lux lxTable 48-9. Recommended Abbreviations
Unit or Term Symbol or
Abbreviation