AFB Air Force Base
AICUZ Air Installation Compatible Use Zone
APZ Accident Potential Zone
CZ Clear Zone
dB Decibels
dBA Weighted decibels
DoD Department of Defense
FAA Federal Aviation Administration
IDOT Illinois Department of Transportation
LDN Day-night sound level
NLR Noise Level Reduction
RAB Regional Advisory Board
RPZ Runway Protection Zone
SLUCM Standard Land Use Coding Manual
STC Sound Transmission Class