(A) All definitions and terminology used in this section, not defined below, shall be in conformance with applicable publications of the American National Standards Institute (ANSI) or its successor body.
(B) For the purpose of this subchapter the following definitions shall apply unless the context clearly indicates or requires a different meaning.
A-WEIGHTED SOUND LEVEL. The sound pressure level in decibels as measured on a sound level meter using the A-weighting network. The level so read is designated dB(A) or dBA.
DECIBEL (db). A unit of sound pressure measurement as defined by the American National Standards Institute Bulletin.
dB(A). A weighted scale for measuring decibels as defined in the American National Standards Institute Bulletin.
MODIFIED EXHAUST SYSTEMS. An exhaust system in which the original noise abatement devices have been physically altered causing them to be less effective in reducing noise or the original noise abatement devices have either been removed or replaced by noise abatement devices which are not as effective in reducing noise as their original devices, or devices have been added to the original noise abatement devices such that noise levels are increased.
MOTOR VEHICLE. Any automobile, van, motorcycle, motor-driven cycle, motor scooter, dune buggy, snowmobile, all-terrain vehicle, go-cart, minibike, trail bike, or truck with gross vehicular weight of less than 8,000 pounds.
NOISE LEVEL. The A-weighted sound level produced by a motor vehicle.
SOUND LEVEL METER. An instrument which includes a microphone, amplifier, RMS detector, integrator or time averager, output meter, and weighting networks used to measure sound pressure levels. Such instrument shall be used for measurement of the intensity of sound and calibrated on decibels as standardized by the American National Standards Institute. Readings shall be made on a dB(A) scale.
TRAFFIC NOISE. Sound made by a motor vehicle operated either on the public right-of-way or private property.
(1981 Code, § 72.50) (Ord. 5709-80, passed 12-22-1980)