For the purpose of this chapter the following definitions shall apply unless the context clearly indicates or requires a different meaning.
A-WEIGHTED SOUND LEVEL. The sound pressure level in decibles as measured on a sound level meter using the A-weighting network. The level so read is designated db (A) or dbA.
DECIBEL (db). This means a unit of sound pressure measurement as defined by the American National Standards Institute bulletin.
LIGHT MOTOR VEHICLES. Any automobile, van, motorcycle, motor-driven cycle, motor scooter, dune buggy, snowmobile, all-terrain vehicles, go-carts, minibikes, trail bikes, or trucks with gross vehicular weight of less than 8,000 pounds.
MODIFIED AND DEFECTIVE 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.
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. The instrument shall be used for measurement of the intensity of sound and calibrated in decibels as standardized by the American Standard Association. 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.
(Ord. PO-81-1, passed 5-11-81)