The definitions in §
325-5 of this chapter shall apply. In addition, the following words and phrases when used in this article shall, for the purposes of this article, have the meanings respectively ascribed to them in this section, except in those situations where the context clearly indicates a different meaning:
A-WEIGHTED SOUND PRESSURE LEVELThe sound pressure level as measured on a sound level meter using the A-weighted network or scale as specified in ANSI S1.4-1983 (R1997) or its successor publication. The level read shall be postscripted dB(A) or dBA.
DECIBELA unit which describes the sound pressure level or intensity of sound. The sound pressure level in decibels is 20 times the logarithm to the base 10 of the ratio of the pressure of the sound in microbars to a reference pressure of 0.0002 microbar, abbreviated dB.
DEVICEAny mechanism which is intended to or which actually produces a noise when operated or handled.
DISPLACEMENTThe single amplitude displacement of the vibration in inches.
EMERGENCY WORKWork made necessary to restore property to a safe condition following a public calamity or work required to protect persons or property from immediate exposure to danger, including work performed by public service companies when emergency inspection, repair of facilities or restoration of services is required for the immediate health, safety or welfare of the community.
ENVIRONMENTAL PROFESSIONALA person possessing sufficient education, training, related project experience and certifications necessary to evaluate a proposed use in accordance with the environmental performance standards set forth in this article and having the ability to develop opinions and conclusions regarding the environmental impacts of the proposed use. An individual's status as an environmental professional may be limited to the type of assessment to be performed or to specific segments of the assessment for which the professional is responsible. In conjunction with the sealing of the environmental impact statement (EIS), the registered professional engineer who is in responsible charge of preparing the EIS shall provide certification that the environmental professionals involved in preparing the EIS under his/her charge are qualified in their specific fields.
ENVIRONMENTAL IMPACT STATEMENTA statement of environmental impact which addresses methods of compliance for each and every environmental performance standard listed in the Flexible Development District Ordinance.
EQUIVALENT 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 pressure level.
MOTOR VEHICLEAny vehicle which is self-propelled, except one which is propelled solely by human power or by electric power obtained from overhead trolley wires, but not operated upon rails.
NOISE DISTURBANCEAny unnecessary sound which annoys, disturbs or perturbs reasonable persons with normal sensitivities or any unnecessary sound which reasonably may be perceived to injure or endanger the comfort, repose, health, peace or safety of any person.
OCTAVE BAND ANALYZERAn instrument to measure the octave band composition of a sound by means of a bandpass filter. It shall meet the specifications of the American National Standards Institute publications S14-1983 (R1997), S1.6-1984 (R1997) and S1.11-1986 (R1998), or their successor publications.
PARTICLE VELOCITYThe distance a particle travels in inches per second and is computed using the following formula with the elements defined in this section: PV = 6.28 F x D.
PARTICLE VELOCITY MEASUREMENTThe velocity measured in three mutually perpendicular directions. The maximum allowable peak particle velocity shall apply to each of the three measurements.
POWERED MODEL VEHICLESAny mechanically powered vehicle, either airborne, waterborne or land borne, which is not designed to carry persons or property, including but not limited to model airplanes, boats, cars and rockets.
PROPERTY BOUNDARYAny point along the property line from ground level to any point above the ground along a vertical plane.
SOUNDA temporal and spatial oscillation in pressure, or other physical quantity, in a medium with internal forces that causes compression and rarefaction of that medium and which propagates at finite speed to distant points.
SOUND LEVEL METERAn instrument to measure sound pressure levels which shall meet or exceed performance standards for a Type Two meter as specified by the American National Standards Institute S1-4-1983 (R1997) or its successor publications.
SOUND PRESSUREThe instantaneous difference between the actual pressure and the average or barometric pressure at a given point in space.
STATIONARY NOISE SOURCEAny equipment or facility, fixed or movable, capable of emitting sound beyond the property boundary of the property on which it is used.
VIBRATIONAn oscillatory motion of solid bodies of deterministic of random nature described by displacement, velocity or acceleration with respect to a given reference point.
VIBRATION FREQUENCYThe time rate of repetition of a periodic phenomenon in cycles per second and calculated as the reciprocal of the period.