The following terms, when used in this chapter, shall have the meanings hereinafter ascribed to them, unless otherwise clearly provided or indicated by the context:
"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.
"Apparent property boundary"means an imaginary line along the ground surface, and its vertical extension, which from observation of the existing conditions appears to separate the real property owned or controlled by one person from that owned or controlled by another person, but not including intra-building real property divisions.
"Decibel (dB)"means 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).
"Emergency"means any occurrence or set of circumstances involving actual or imminent physical trauma or property damage which demands immediate action.
"Emergency work"means any work performed for the purpose of preventing or alleviating the physical trauma or property damage threatened or caused by an emergency.
"Excessive sound"means noise that exceeds 65 dBA unless otherwise specifically provided in this chapter.
"Gross vehicle weight rating (GVWR)"means 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.
"Motor vehicle"means any self-propelled device or device designed for self-propulsion, upon or by which any person or property is or may be drawn or transported upon a street, except devices moved by human power or used exclusively upon stationary wheels or tracks.
"Motorcycle"means any motor vehicle designed to travel on not more than three wheels in contact with the ground and any four-wheeled vehicle weighing less than 500 pounds and equipped with an engine of less than six horsepower, excepting farm tractors.
"Noise"means any sound which annoys or disturbs humans or which causes or tends to cause an adverse psychological or physiological effect on humans.
"Residential zone"means any location within any area zoned residential pursuant to the city's zoning ordinance.
"Sound"means 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"means the weighted sound pressure level obtained by the use of a sound level meter and the A-frequency weighting network, as specified in American National Standards Institute specifications for sound level meters.
"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.
(Code 1985 § 17-2; Ord. 2009-11)