539.02 DEFINITIONS.

   All definitions and terminology used in this chapter not defined below, shall be in a conformance with applicable publications of the American National Standards Institute (ANSI) or its successor body.

   For the purpose of this chapter the following terms, phrases, words and their derivation have meanings as follows:

   (a)   "A-weighted sound level" means 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.

   (b)   "Decibel (db)" means a unit of sound pressure measurement as defined by the American National Standards Institute bulletin.

   (c)   "dB(A)" means a weighted scale for measuring decibels as defined in the American National Standards Institute Bulletin.

   (d)   "Noise level" means the A-weighted sound level produced by a motor vehicle.

   (e)   "Person" means any individual, association, partnership or corporation, and includes any officer, employee, department, agency or instrumentality.

   (f)   "Sound level meter" means 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 in decibels as standardized by the American Standard Association Readings made on a dB(A) scale.

   (g)   "Traffic noise" means sound made by a motor vehicle operated either on the public right of way or private property.

   (h)   "Motor vehicle" means any automobile, van, motorcycle, motor-driven cycle, motor scooter, dune buggy, snowmobile, all terrain vehicle, go-cart, minibike, trail bike or truck with a gross vehicular weight of less than 8,000 pounds.

   (i)   "Modified exhaust system" means 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.

   (j)   "Noise disturbance" means any sound which:

      (1)   Endangers or injures the safety or health of humans or animals, or

      (2)   Annoys or disturbs a reasonable person of normal sensitivities, or

      (3)   Endangers or injures personal or real property.

         (Ord. 80-555. Passed 6-25-80.)