For the purposes of this chapter, certain words
and phrases used herein are defined as follows:
AMBIENT NOISE LEVEL
An existing level of all-encompassing noise associated with
a given environment, usually a composite of sounds from many sources
near and far, without inclusion of intruding noises from isolated
identifiable sources.
AMPLIFICATION
The use of any input of voltage, current, power or other
means so as to obtain an output of greater magnitude of sound.
[Added 3-28-2006]
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.
DECIBEL (dB)
A unit for measuring the volume of a sound equal to 20 times
the logarithm to the base ten of the ratio of the pressure of the
sound measured to the reference pressure, which is 20 micropascals.
EMERGENCY WORK
Work made necessary to restore property to a safe condition
following a public calamity or work required to protect persons or
property from an imminent exposure to danger.
EQUIVALENT A-WEIGHTED SOUND LEVEL (LEG)
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 for a give period of time. For the purpose of this chapter,
"given period of time" is defined as any continuous eight-hour period.
FIXED NOISE SOURCE
A stationary device which creates sounds, including but not
limited to agricultural, commercial, industrial, and residential machinery
and equipment, pumps, fans, compressors, air conditioners and refrigeration
equipment.
IMPULSIVE SOUND
A short-duration sound of one second or less with an abrupt
onset and rapid decay, including explosion, drop forge impact, or
firearm discharge. Sources generating impulsive noise for an average
of more than five seconds per hour over any eight-hour period shall
be deemed and subject to the same maximum noise level limits as a
fixed noise source.
PERSON
Any individual, association, partnership, or corporation,
and includes any officer, employee, department, agency or entity,
public or private.
PRIVATE PERSON
Any individual, association, partnership or corporation,
but excluding municipal or quasi-municipal entities.
PROPERTY OWNER
The person holding title to the real property as evidenced
by the records in the County Registry of Deeds.
PUBLIC RIGHT-OF WAY
Any street, avenue, boulevard, highway, sidewalk, or alley
that is maintained by the City.
REAL PROPERTY BOUNDARY
The property line along the ground surface, and its vertical
extension, that separates the real property owned by one person from
that owned by another person or separates real property from the public
right-of-way. For the purpose of enforcing this chapter, boundary
lines as shown on the City's tax maps shall be prima facie evidence
of those boundaries.
RESPONSIBLE PARTY
If the person or persons responsible for any activity which violates this chapter cannot be determined, the person in lawful custody and/or control of the premises, including but not limited to the owner, lessee or occupant of the property on which the activity is located, shall be deemed responsible for the violation. The responsible person may be prosecuted under this chapter and shall be subjected to the penalties set forth in §
204-6.
SOUND-LEVEL METER
An instrument, including a microphone, an amplifier, an output
meter, and frequency weighting networks, for the measurement of sound
levels which meets or exceeds the requirements pertinent for Type
SEA meters in the American National Standards Institute specifications
for sound-level meters, S1.4-1971, or the most recent revision thereof.
The following uses and activities shall be exempt from the noise prohibitions described in §§
204-3 and
204-4 of this chapter:
A. Noises of safety signals, warning devices, and emergency
pressure-relief valves.
B. Warning devices. Any alarm, siren, bell, or whistle
required by OSHA or other state or federal safety regulations.
C. Noises resulting from any authorized emergency vehicle,
when responding to an emergency call or acting in time of emergency,
or in connection with official police or fire business.
D. Noises resulting from emergency work as defined in §
204-2 of this chapter.
E. Cries for emergency assistance and warning calls.
F. Ambient traffic noise generated by vehicles traveling
on federal interstate highways or state-defined primary or major secondary
highways.
G. Any aircraft operated in conformity with, or pursuant
to, federal law, federal air regulations, and air traffic control
instruction used pursuant to and within the duly adopted federal air
regulations; moreover, any aircraft operating under technical difficulties,
in any kind of distress, under emergency orders of air traffic control
or being operated pursuant to and subsequent to the declaration of
an emergency under federal air regulations.
H. All noises resulting from normal operations of railroad
trains are exempt; provided, however, that excessive use of railroad
train signaling devices is declared to be loud, disturbing, and unnecessary
noise.
I. Any sound, such as tire screeching, resulting from
emergency braking.
J. Noises made by places of worship using bells, chimes
or carillons as part of their religious observance and by persons
having obtained a permit to use the streets.
K. Any commercial or industrial use which is in existence and exceeds the applicable sound-level limits from customary operations as of the effective date of this chapter. Any such use shall have its sound levels measured at its real property boundary by the City within three months from the effective date of this chapter to establish a baseline sound level for its normal and customary operations. For the purposes of this chapter, that sound-level determination shall be substituted for the applicable sound-level limits set forth in §
204-3.
L. Highway and utility maintenance and construction of,
or repairs to, bridges, streets or highways or any public utility
installation by or on behalf of the City or any public utility or
any agency of the state.
M. Construction operations for which building permits
have been issued, or construction operations not requiring permits
due to ownership of the project by an agency of the government, provided
that such equipment is operated with the manufacturing mufflers and
noise-reducing equipment in use and in proper operating condition.
N. Farming equipment or farming activity performed during
the hours of 6:00 a.m. to 11:00 p.m.
O. The operation of refuse collection machinery and equipment,
provided that such machinery and equipment is in compliance with all
laws and regulations applicable thereto.
P. The reasonable use of amplifiers or loudspeakers for
public addresses which are noncommercial in nature.
Q. Any nonamplified crowd noises resulting from legal
activities, such as scheduled sporting events at publicly owned arenas,
stadiums, or similar facilities, as well as public concerts, parades,
fairs, shows, and celebrations which have been properly permitted
and licensed.
R. Any other noise resulting from activities of a temporary
duration permitted by law and for which a license or permit therefor
has been granted by the City.