As used in this chapter, the following terms shall
have the meanings indicated:
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."
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.
DAY-NIGHT AVERAGE SOUND LEVEL (one dn)
The twenty-four-hour energy average of the A-weighted sound
pressure level, with the levels during the period of 10:00 p.m. to
7:00 a.m. the following day increased by 10 dBa's before averaging.
DECIBEL (dB)
A unit for measuring the volume of a sound, 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).
DEMOLITION
Any dismantling, intentional destruction or removal of structures,
utilities, public or private right-of-way surfaces 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 (L eq)
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 the purposes of this chapter, a time period of 24 hours
shall be used, unless otherwise specified.
GROSS VEHICLE WEIGHT RATING (GVWR)
The value specified by the manufacturer as the recommended
maximum loaded weight of a single motor vehicle. In cases where trailers
and tractors are separable, the gross combination weight rating (GCWR),
which is the value specified by the manufacturer as the recommended
maximum loaded weight of the combination vehicle, shall be used.
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 explosions, drop forge impacts and the discharge of
firearms.
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 craft.
MOTORCYCLE
As defined in the Motor Vehicle Code of the State of New
Jersey.
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 endangers or injures the safety or health
of humans or animals or annoys or disturbs a reasonable person of
normal sensitivities or endangers or injures personal or real property.
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.
REAL PROPERTY BOUNDARY
Any imaginary line along the ground surface, and its vertical
extension, which separates the real property owned by one person from
that owned by another person, but not including intrabuilding real
property divisions.
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
of sound level meters. If the frequency weighting employed is not
indicated, the A-weighting shall apply.
SOUND LEVEL METER
An instrument which includes a microphone, amplifier, RMS
detector, integrator or time averager, output meter and weighting
networks used to measure sound pressure levels and meets ANSI S-1.4.
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 times 10-6 newtons per square meter).
The sound pressure level is denoted L p or SPL and is expressed in
decibels.
VIBRATION
An oscillatory motion of solid bodies of deterministic or
random nature described by displacement, velocity or acceleration
with respect to a given reference point.