All terminology used in this section not defined below shall be in conformance with applicable publications of the American National Standards Institute (ANSI).
“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.
“AMBIENT NOISE LEVEL.” The sound pressure level, in decibels, as measured on a sound level analyzer using the A-weighting network that represents the existing noise level of all surrounding sources.
“ANSI.” The American National Standards Institute.
“COMMERCIAL DISTRICT.” Those areas zoned and designated for commercial uses on the city's official zoning map (including, but not limited to, PO, C-1, C-2), and/or future land use map or areas where commercial uses exist.
“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 sound, equal to 20 times the logarithm to the base of the ratio of the pressure of the sound measured to the reference pressure, which is 20 micropascals (20 micro-newtons per square meter).
“DEMOLITION.” Any dismantling, intentional destruction or removal of structures, utilities, public or private right-of-way surfaces, structures or similar property.
“EMERGENCY.” Any occurrence or set of 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 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.
“EXCEPTION.” Any sound emitted for the purpose of alerting persons to the existence of any emergency, or the emission of sound in the performance of emergency work.
“EXEMPTION.” Any person or persons seeking through the City Commission relief from the obligations of this section.
“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, but are not limited to, explosions, drop forge impacts, and the discharge of firearms.
“INDUSTRIAL DISTRICT.” Those areas zoned and designated for industrial use on the city's official zoning map (including, but not limited to, M-1A, M-2A) and/or future land use map or areas where industrial uses exist.
“MOTOR VEHICLE.” Any vehicle which is defined as a "motor vehicle" by F.S. Ch. 316.
“MOTORBOAT.” Any vessel which operates on water and which is propelled by a motor, including, but not limited to, boats, barges, amphibious crafts, water ski towing devices and hover crafts.
“MOTORCYCLE.” Any "motorcycle" as defined in F.S. Ch. 316.
“MUFFLER” or “SOUND DISSIPATIVE DEVICE.” A device for abating the sound of escaping gases of an internal combustion engine.
“NOISE.” Any unwanted sound which annoys or disturbs humans or which causes or tends to cause an adverse psychological or physiological effect on humans.
“NOISE DISTURBANCE.” Any sound which:
(1) Endangers or injures the safety or health of humans or animals; or
(2) Annoys or disturbs a reasonable person of normal sensitivities; or
(3) Endangers or injures personal or real property; or
(4) Is loud, raucous and unseemly.
For purposes of this definition, any sound that exceeds the maximum permissible sound levels set forth in § 91.18 shall constitute a noise disturbance per se. It is the intent and purpose of this definition that sounds that either meet the aforesaid criteria or exceed the sound levels in § 91.18 or both shall constitute a violation of this chapter.
“NOISE SENSITIVE ZONE.” Any area designated by the City Commission for the purpose of ensuring exceptional quiet in accordance with § 91.16(B)(6), such as, but not limited to, schools, courts, churches, hospitals, and other convalescent areas, and residential districts from 10:00 p.m. Friday to 10:00 p.m. Sunday.
“OCTAVE BAND.” The sound pressure level of a defined frequency band with the reference pressure being 20 micro-newtons per square meter. As used in this section, these are defined in Table 1 of this subchapter.
“PERSON.” Any individual, association, partnership, corporation, entity or agency including any officer and employee thereof.
“POWERED MODEL VEHICLE.” Any self- propelled airborne, waterborne, or land borne plane, vessel, or vehicle, which is not designed to carry persons, including, but not limited to, any model airplane, boat, car or rocket.
“PROPERTY LINE.” An imaginary line along the surface of land or water, and its vertical plane extension, which separates the real property owned, rented or leased by a person from the real property owned, rented or leased by another person.
“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.
“PURE TONE.” Any sound which can be distinctly heard as a signal pitch or a set of single pitches. For the purposes of the section, a pure tone shall exist if the one-third octave band sound pressure level in the band with the tone exceeds the arithmetic average of the sound pressure levels of the two contiguous one-third octave bands by 5 dB for center frequencies of 500 Hz and above and by 8 dB for center frequencies between 160 and 400 Hz and by 15 dB for center frequencies less than or equal to 125 Hz.
“RESIDENTIAL DISTRICT.” Those areas zoned and designated for residential uses on the city's official zoning map (including, but not limited to, R-CE, R-1AAA, R-1AA, R-1A, R-2, R-3, RM, DC, and PUD residential) and/or future land use map or areas where residential uses exist.
“RMS SOUND PRESSURE.” The square root of the time averaged square of the sound pressure, denoted P rms .
“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, or C as specified in 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 ANALYZER.” An instrument which includes a microphone, amplifier, RMS detector, integrator or time average, 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 10 of the ratio of the RMS sound pressure to the reference pressure of 20 micropascals (20 x 10-6 N/m2). The sound pressure level is denoted Lp or SPL and is expressed in decibels.
“SUSTAINED NOISE.” A sound pressure level which remains essentially constant during the period of observation.
“WEEKDAY.” Any day Monday through Friday, which is not a legal holiday.
(Ord. 1218, passed 11-2-06)