§ 95.01 DEFINITIONS.

   (A)   For the purpose of this chapter the following definitions shall apply unless the context clearly indicates or requires a different meaning.

   (B)   All terminology used in this chapter shall be in conformance with applicable publications of the American National Standards Institute (ANSI) or its successor body.

   A-WEIGHTED SOUND LEVEL. The sound pressure level of a sound measured through an A-weighting filter network. The level read is designated DB(A) or DBA.

   COMMERCIAL ZONE. Business District zones as established by the zoning code, as amended.

   DECIBEL (DB). The unit used for comparing the sound pressure level of a sound to the sound pressure level of a reference sound having a sound pressure of 20 micropascals.

   FREQUENCY. The number of periodic oscillations, vibrations, or waves per unit time (usually one second).

   HERTZ (HZ). The unit used for measuring the frequency of a sound. The number of hertz is a number of cycles per second of a periodic sound pressure wave.

   INDUSTRIAL ZONE. Manufacturing District zones as established by the zoning code, as amended.

   LIGHT MOTOR VEHICLE. Any motorized vehicle with gross vehicular weight less than 8,000 pounds including automobiles, vans, motorcycles, motor-driven cycles, motor scooters, dune buggies, snowmobiles, all-terrain vehicles, go karts, minibikes, trail bikes, and light trucks.

   MODIFIED EXHAUST SYSTEM. Any exhaust system in which the original noise abatement devices have been removed, altered, or replaced to produce more noise.

   NOISE. Any unwanted sound.

   OCTAVE BAND. A portion of the entire sound frequency spectrum contained between two frequencies A and B such that A=2B.

   PERSON. Any individual, firm, partnership, association, corporation, company, or organization of any kind.

   PLAINLY AUDIBLE. Any noise for which the information content is unambiguously communicated to the listener, including understandable spoken speech, comprehension of whether a voice is raised (agitated) or normal or comprehensible musical rhythms.

   RESIDENTIAL ZONES. Residential District zones as established by the zoning code, as amended.

   SOUND LEVEL METER. An instrument designed to measure sound pressure levels.

   SOUND PRESSURE LEVEL. Twenty times the logarithm (Base 10) of the ratio of the measured sound pressure to a referenced pressure of 20 micropascals. The sound pressure level is expressed in decibels (DB).

         SPL = 20 LOG 10      Sound Pressure A
                      Sound Pressure B

            Sound Pressure A = Measured sound pressure
            Sound Pressure B = Referenced sound pressure
                     (20 Micropascals)

(Ord. 82-7, passed 3-8-82)