When used in this article, the following definitions, unless the context clearly indicates or requires a different meaning, shall be interpreted as follows:
A-weighted sound levelmeans the sound pressure level in decibels as measured on a sound level meter using the A-weighted network and the fast response setting. This level is designated dB(A) or dBA.
Background/ambient sound pressure levelmeans the measured value which represent the summation of the sound from all of the discrete sources affecting a given time, exclusive of extraneous sounds and the specific sound from the source under investigation.
Background/ambient soundsmeans sounds that are relatively constant at the point of measurement, constitute the normal or existing environmental noise at the location, and pre-exist the sound being measured.
Boundary linemeans the line along the ground surface and its vertical extension which separates the real property owned, leased or occupied by one person from that owned, leased, or occupied by any other person and the imaginary line which represents the legal limits of property of any person who owns, leases, or otherwise occupies an apartment, condominium, hotel or motel room, office or any other type of occupancy.
C-weighted sound levelmeans the sound pressure level in decibels as measured on a sound level meter using the C-weighted network and the fast response setting. This level is designated dB(c) or dBC.
Constructionmeans any site preparation, assembly, erection, substantial repair, alteration or similar action (excluding demolition) of public or private right-of-way surfaces, structures, utilities or similar property.
Daytimemeans hours between 7:00 a.m. and 7:00 p.m.
Decibelmeans the unit used to measure the intensity of a sound or the power level of an electrical signal by comparing it with a given level on a logarithmic scale. Represented by the symbol dB.
Demolitionmeans any dismantling, intentional destruction, or removal of structures, utilities, public or private right-of-way surfaces, or similar property, but excluding construction.
Devicemeans any mechanism that is intended to produce, or which actually produces, noise when operated or handled.
Emergency vehiclemeans a motor vehicle used in response to a public calamity or to protect persons or property from an imminent exposure to danger.
Emergency workmeans work made necessary to restore property to a safe condition following a public calamity, work to restore public utilities, or work required to protect persons or property from an imminent danger.
Extraneous soundmeans short-duration or intermittent sound that is neither part of the background sound, nor comes from the sound source under investigation.
Impulsive soundmeans 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.
Industrialmeans any premises where manufacturing, processing or fabrication of goods or products takes place.
Motor vehiclemeans any vehicle propelled by mechanical power, such as, but not limited to, any passenger car, truck, truck-trailer, semitrailer, camper, motorcycle, minibike, go-cart, dune buggy, or racing vehicle.
Mufflemeans any apparatus consisting of baffles, chambers, or acoustical absorbing material whose primary purpose is to transmit liquids or gases while causing a significant reduction in sound emission.
Nighttimemeans the hours between 7:01 p.m. and 6:59 a.m.
Noise disturbancemeans any sound that is unwanted or which causes, or tends to cause, an adverse psychological effect on human beings, or is an offense in violation of this article.
Noise variancemeans a suspension of the literal enforcement of the noise provisions identified in this City Code.
Noise zonesmeans the establishment based on the use of the property as may be described in this article. Noise zones are not associated with zoning districts established in the Forest Hill Zoning Ordinance (article
9.02).
Ownermeans any person having supervision or control of any property.
Personmeans any individual, firm, association, partnership, corporation, or any other entity, public or private.
Plainly audiblemeans any noise that can be detected by a peace officer or other enforcement agent using his or her unaided hearing faculties of normal acuity. As an example, if the sound source under investigation is a portable or vehicular sound amplification or reproduction device, the detection of the rhythmic bass component of the music is sufficient to verify plainly audible noise. The peace officer or other enforcement agent need not determine the title, specific words, or the artist performing the song.
Power equipmentmeans any motorized electric or fuel powered equipment, including yet not limited to tractors, lawnmowers and other similar device or equipment.
Power motor vehiclemeans any self-propelled airborne, waterborne or land-borne plane, vessel or vehicle, which is not designed to carry persons, including yet not limited to, any model airplane, boat, car or rocket.
Property boundarymeans an imaginary line at the ground surface and its vertical extension that separates the real property owned or occupied by one person from that owned or occupied by another person.
Propertymeans any lot, tract, parcel of land or a portion thereof, occupied or unoccupied, improved or unimproved, public or private, within the territorial limits of the city.
Pure tonemeans any sound that can be distinctly heard as a single pitch or a set of single pitches.
Residential districtmeans any district classified as containing residential homes, apartments, condominiums or dwelling units.
Roadwaymeans any street, alley, parkway, sidewalk or gutter.
Sound level metermeans an instrument, which includes a microphone, amplifier, RMS detector and integrator, time average, output meter, and weighting networks, that is sensitive to pressure fluctuations. The instrument reads sound pressure levels when properly calculated with an acoustical calibrator accurate to 1 dB and is type I or type II as specified in ANSI S1.4-1971 (American National Standards Institute), or the latest approved revision thereof.
Sound levelmeans the instantaneous sound pressure level measured in decibels obtained by the use of a sound level meter set for A-weighting on slow integration speed, unless otherwise noted.
Soundmeans an oscillation in pressure, stress, particle displacement and particle velocity which induce auditory sensation. The description of sound may include any characteristic of sound, including duration, intensity, and frequency.
Specific soundmeans any sound that is clearly distinguishable from the background sounds.
Temporary noise permitmeans an administrative approval, reviewed and approved by the City Manager or the City Manager's designee, allowing noise during days and times in which noise may not otherwise be permissible or to allow noise to exceed the permissible decibel limitations of this article on a temporary basis.
Vibration perception thresholdmeans the minimum ground- or structure-borne vibrational motion necessary to cause a person to be aware of the vibration by such direct means as, but not limited to, sensation by touch or visual observation of moving objects.
Vibrationmeans temporal and spatial oscillation of displacement, velocity or acceleration in a solid material.
(Ordinance 2025-24 adopted 9/16/2025)