Definitions. All terms used in this section that are not defined
in this code, shall have the meaning provided by applicable publications
of the american national standards institute (ANSI) or its successor
body. In this section:
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 as db(A) or dBA.
AMBIENT SOUND
Means the all-encompassing sound associated with a given
environment being usually a composite of sounds from near and far.
AMPLIFIED SOUND
Means voice or other sound, other than background music,
that is amplified by a mechanical or electronic device, or multiple
mechanical or electronic devices, whenever the sound amplified is
intended to be audible outside a dwelling or business enclosure by
an audience located within a geographically defined area.
BACKGROUND MUSIC
Means amplified music that plays continuously for extended
periods of time and that is intended to serve as a background for
other activities that occur within a geographically defined area such
as shopping or dining.
CONSTRUCTION
Means a non-emergency related activity necessary or incidental
to the erection, demolition, assembling, altering, installing, repairing
or equipping of buildings, roadways, or utilities, including land
clearing, grading, excavating and filling.
EMERGENCY WORK
Means work necessary to restore property to a safe condition
following a public calamity, work required to restore public utilities,
or work required to protect persons or property from imminent exposure
to danger.
IMPULSE SOUND
Means sound of short duration, usually less than one second,
with an abrupt onset and rapid decay. Examples of sources of impulse
sound include explosions, drop forge impacts and the discharge of
firearms.
MUFFLER
Means a sound dissipative device or system for abating sound
of escaping gases on equipment where such device is part of the normal
configuration of powered equipment.
NUISANCE NOISE
Means any sound which tends to disturb reasonable persons
in the vicinity thereof or tends to cause an adverse psychological
or physiological effect on humans, regardless of whether such sound
exceeds the stationary sound limits imposed by this section.
RECEIVING ZONE
Means the zoning district in which is located the real property at which the sound being measured is received. The zoning classification shall be that as set forth in section
5-1-3 of this code.
SOUND LEVEL METER
Means an instrument which includes a microphone, amplifier,
RMS detector, integrator or time averager, output meter, and weighing
networks used to measure sound pressure levels. The instrument shall
comply with the standards for Type 1 or Type 2 sound level meters
as specified in the american national standards institute ANSI S1.4-1983
(revised 2001) with amendments s1.4A-1995 or its successor.
STATIONARY SOUND
Means sound emanating from a source that is either affixed
to or operated upon a fixed point of land, building or other real
property.
TRAFFIC SOUNDS
Means sounds emanating from the normal operation of motorized
vehicles, including all-terrain vehicles, upon public or private roads,
streets and highways and trails. Nuisance noise which emanates from
the operation of one or more motorized vehicles upon private property
shall be considered as stationary sound for the purposes of this section.