All terminology used in this chapter, not defined below, shall be in conformance with applicable publications of the American National Standards Institute (ANSI) or its successor body. A copy of the applicable ANSI standards shall be filed with the City Clerk and shall be available during normal working hours. For the purpose of this chapter the following definitions shall apply unless the context clearly indicates or requires a different meaning.
AGRICULTURAL AREA. Any area and LLR zoning districts as designated pursuant to the city's zoning ordinance, as adopted in § 151.35.
AMBIENT NOISE. All encompassing noise associated with a given environment, being usually a composite of sounds from many sources, near and far.
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.
COMMERCIAL AREA. Any area in the C-1 and C-2 zoning districts as designated pursuant to the city's zoning ordinance, as adopted in § 151.35
CONSTRUCTION. Any site preparation, assembly, erection, substantial repair, alteration, or similar action on public or private property.
DECIBEL (dB). A logarithmic and dimensionless unit for measuring the volume of a sound, equal to 20 times the logarithm to the base tea of the ratio of the pressure of the sound measured to the reference pressure, which is 20 micropascals (20 micronewtons per square meter).
EMERGENCY. Any occurrence or set of circumstances involving actual or imminent physical trauma or property damage that demands immediate action.
EMERGENCY WORK. Any work performed for the purpose of preventing or alleviating the physical trauma or property damage threatened or caused by an emergency.
EQUIVALENT A-WEIGHTED SOUND LEVEL (Leq). The constant sound level that, in a given situation and time period, conveys the same sound energy as the actual time-varying A-weighted sound.
GROSS VEHICLE WEIGHT RATING (GVWR). The value specified by the manufacturer as the recommended maximum loaded weight of a single motor vehicle. In cases where trailers and tractors are separable, the gross combination weight rating (GCWR), which is the value specified by the manufacturer as the recommended maximum loaded weight of the combination vehicle, shall be used.
HEALTH OFFICER. The Chief of Police of the city, or said individual's deputies.
IMPULSIVE SOUND. Sound of short duration, usually less than one second, with an abrupt onset and rapid decay. Examples of sources of impulsive sound include explosions, drop forge impacts, and the discharge of firearms.
INDUSTRIAL AREA. Any area in the I-1 and I-2 zoning districts as designated pursuant to the city's zoning ordinance, as adopted in § 151.35.
MOTOR VEHICLE. Any vehicle which is propelled or drawn on land by a motor, such as, but not limited to, passenger cars, trucks, truck-trailers, semi-trailers, campers, go-carts, snowmobiles, amphibious craft on land, dune buggies, or racing vehicles, but not including motorcycles.
MOTORBOAT. Any vessel which operates on water that is propelled by a motor, including, but not limited to, boats, barges, amphibious craft, water ski towing devices, and hovercraft.
MOTORCYCLE. An unenclosed motor vehicle having a saddle for the use of the operator and two or three wheels in contact with the ground, including, but not limited to, motor scooters, mini bikes, and motor driven cycles.
MUFFLER. A device for diminishing the sound of projected noise from an internal combustion engine.
NOISE. Any sound not occurring in the natural environment that causes or tends to cause an adverse psychological or physiological effect on humans.
NOISE DISTURBANCE. Any sound not occurring in the natural environment that would tend to annoy or disturb humans with reasonable sensitivities, or which injures or endangers the comfort, health, welfare, hearing, peace, or safety of other persons.
POWERED MODEL VEHICLE. Any self-propelled airborne, waterborne, or landborne plane, vessel, or vehicle which is not designed to carry persons, including, but not limited to, any model airplane, boat, car, or rocket.
PUBLIC RIGHT-OF-WAY. Any street, avenue, boulevard, highway, sidewalk, or alley or similar place that is owned or controlled by a governmental entity.
PUBLIC SPACE. Real property or structures thereon which are owned or controlled by a governmental entity.
PURE TONE. Any sound that can be distinctly heard as a single pitch or a set of single pitches.
REAL PROPERTY BOUNDARY. An imaginary line along the ground surface, and its vertical extension, which separates the real property owned by one person from that owned by another person, but not including intrabuilding real property divisions.
RESIDENTIAL AREA. Any area in the NRC, R-1, R-2 and R-3 zoning districts as designated pursuant to the city's zoning ordinance, as adopted in § 151.35.
RMS SOUND PRESSURE. The square root of the time-averaged square of the sound pressure, denoted Prms.
SOUND. An oscillation in pressure, particle displacement, particle velocity, or other physical parameter in a medium with internal forces that causes compression and rarefaction of that medium. The description of sound may include any characteristic of such sound, including duration, intensity, and frequency.
SOUND LEVEL. The weighted sound pressure level obtained by the use of a sound level meter and frequency weighting network, such as A, B, C, flat, or linear as specified in American National Standards Institute specifications for sound level meters (ANSI § 1A1971, or the latest approved revision thereof). If the frequency weighting employed is not indicated, the A-weighting shall apply.
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.
SOUND PRESSURE. The instantaneous difference between the actual pressure and the average or barometric pressure at a given point in space, as produced by sound energy.
SOUND PRESSURE LEVEL. Twenty times the logarithm to the base ten of the ratio of the RMS sound pressure to the reference pressure of twenty micropascals (20 x 10-6 N/m2). SOUND PRESSURE LEVEL is denoted Lp or SPL and is expressed in decibels.
VIBRATION. An oscillatory motion of solid bodies of deterministic or random nature described by displacement, velocity, or acceleration with respect to a given reference.
WEEKDAY. Any day Monday through Friday.
(Ord. 1766, passed 6-14-01)