All terminology used in this article not defined below shall be in conformance with applicable publications of the American National Standards Institute (ANSI) or its successor body.
Ambient level.The noise level associated with a given environment, being a composite of sounds from all sources, excluding the alleged offensive noise at the location and approximate time at which a comparison with the alleged offensive noise is to be made. Ambient noise shall be measured as an integrated average, equivalent level (Leq), over a period of at least 1 minute at a location and time of day comparable to that during which the measurement of the alleged offensive noise is taken.
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.
Construction.Any site preparation, assembly, erection, substantial repair, alteration, or similar action, but excluding demolition, for or of public or private rights-of-way, structures, utilities or similar property.
Decibel (dB).A unit for measuring the volume of a sound, equal to 20 times the logarithm to the base 10 of the ratio of the pressure of the sound measured to the reference pressure, which is 20 micropascals (20 micronewtons per square meter).
Demolition.Any dismantling, intentional destruction or removal of structures, utilities, public or private right-of-way surfaces, or similar property.
Emergency.Any occurrence or set or circumstances involving actual or imminent physical trauma or property damage which 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 sound level (Leq).The constant sound level that, in a given time period, conveys the same sound energy as the actual time-varying sound.
Motorboat.Any vessel which operates on water and is propelled by a motor, including but not limited to boats, barges, amphibious craft, water ski towing devices and hovercraft.
Motorcycle.An enclosed 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 and minibikes.
Noise.Any sound which annoys or disturbs humans or which causes or tends to cause an adverse psychological or physiological effect on humans.
Noise control officer (NCO).A position jointly held by the code official and the police chief responsible for administration and enforcement of this article.
Person.Any individual, association, partnership, or corporation, and includes any officer, employee, department, agency or instrumentality of a state or any political subdivision of a state.
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, which is owned or controlled by a governmental entity.
Public space.Any real property or structures thereon which are owned or controlled by a governmental entity.
Real property boundary.An imaginary line along the ground surface, and its vertical extension, which separates the real property owned or leased by one person from that owned or leased by another person, but not including intra-building real property divisions.
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 or C, as specified in the American National Standards Institute specifications for sound level meters (ANSI S1.4-1971), 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 averaging device, 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 of a given point in space, as produced by sound energy.
Sound pressure level.20 times the logarithm to the base 10 of the ratio of the RMS sound pressure to the reference pressure of 20 micropascals (20 x 10 µN/m). The sound pressure level is denoted Lp or SPL and is expressed in decibels.
Weekday.Any day Monday through Friday which is not a legal holiday.
(Ordinance 2004-08-16-2, art. III, adopted 8/16/04; Ordinance 2012-02-21-03, revs. 1, 2, adopted 2/21/12)