The following words, terms and phrases when used in this section shall have the meaning ascribed to them in this section, except where the context clearly indicates a different meaning.
A-WEIGHTED SOUND LEVEL - the sound pressure level in decibels as measured on a sound level meter using the A-weighing network. The level so read is designated dB(A).
ABSORPTIVE SOUND MITIGATION BARRIER - a physical barrier, such as a berm, vegetation, wall, building, mechanical equipment mitigation barrier or combination of such barriers, intended to reduce sound level of the sound which would otherwise pass through its location.
CONSTRUCTION OPERATION - the erection, repair, renovation, demolition, or removal of any building or structure; and the excavation, filling, grading and regulation of lots in connection therewith.
DECIBEL (dB) - a unit for measuring the sound pressure level, 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 - any occurrence or set of circumstances involving actual or imminent physical trauma or property damage.
EXTRANEOUS SOUND - a sound which is neither part of the neighborhood residual sound nor comes from the source under investigation.
IMPULSIVE SOUND - sound of short duration, usually less than 1 second, with an abrupt onset and rapid decay. Examples of impulsive sound include explosions, drop forge impacts, and the discharge of firearms.
NEIGHBORHOOD RESIDUAL SOUND LEVEL - that measured value which represents the summation of the sound from all of the discrete sources affecting a given site at a given time, exclusive of extraneous and transient sounds and the sound from the source of interest.
NOISE - any 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.
PURE TONE - any sound which can be heard as a single pitch or a set of single pitches.
REAL PROPERTY - all land whether publicly or privately owned, whether improved or not improved, with or without structures, exclusive of any areas devoted to public right-of-way.
REAL PROPERTY BOUNDARY - either (1), the imaginary line, including its vertical extension that separates one parcel of real property from another; or (2), the vertical and horizontal boundaries of a dwelling unit that is one in a multi-dwelling unit building.
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 characteristics 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 weighing network, such as A, B or C.
SOUND LEVEL METER - an instrument used to measure sound level.
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 - the level of a sound measured in dB units with a sound level meter which has a uniform (“flat”) response over the band of frequencies measured.
TRANSIENT SOUND - a sound whose level does not remain constant during measurement.
(Ord. 629, 3-17-21)