[Adopted as Ch. 130, Art. II of the 1976
Code]
As used in this article, the following terms
shall have the meanings indicated:
All-encompassing noise associated with a given environment.
The sound pressure level for the sound contained within the
restricted band. The reference pressure must be specified.
A unit of level when the base of a logarithm is 10 and is
restricted to levels of quantities proportional to power.
The complete sequence of values of a periodic quantity that
occur during a period.
One-tenth of a bel and a unit of level when the base of the
logarithm is the tenth root of 10 and the quantities concerned are
proportional to power.
The duration of a transient noise from a machine during the
entire period when the transient noise is first distinguished from
the ambient noise until the noise from the same machine finally recedes
into the ambient noise, shall be the period of time beginning when
the transient noise first exceeds a certain band pressure level until
it no longer exceeds the same band pressure level and providing it
remains above the same band pressure level for at least 1/3 of the
total duration.
The frequency of a function periodic in time, is the reciprocal
of the primitive period. The unit is the cycle per unit time and must
be specified.
A unit of pressure commonly used in acoustics; equal to one
dyne per square centimeter.
Any increase in the ambient noise, measured as provided in
this article, caused by any mechanical device, including aircraft.
Any individual, firm, association or corporation, whether
such person be the owner, lessee or charterer, his or its pilots or
copilots, as to aircraft, and any individual firm, association and
corporation, its servants, agents or employees, as to any other sound
producing device or mechanism.
A device for measuring the bandpressure level or pressure
spectrum level of a sound as a function of frequency.
An instrument, including a microphone, an amplifier, an output
meter and frequency weighting networks, for the measurement of noise
and sound levels in the manner provided by this article.
In decibels of a sound, is 20 times the logarithm to the
base 10 of the ratio of the pressure of this sound to the reference
pressure, which reference pressure must be explicitly stated.
A function of time and a description of its resolution into
components, each of different frequency; also used to signify continuous
range of components usually wide in extent within which waves have
some specified characteristics such as "audio frequency spectrum";
also applied to functions of variables other than time.
Any noise having a duration in excess of one minute shall
be considered a steady noise, and the limits of Table II[1] of this article shall apply.
Any noise having a duration of one minute or less shall be
considered a transient noise, and the limits of Table I[2] of this article shall apply.
No person shall operate or cause to be operated
any mechanism or device, including but not limited to airplanes, which
shall create a noise within the Village of Great Neck exceeding the
limiting noise spectra set forth in Tables I and II as follows:
|
TABLE I
| |
|---|---|
|
Limiting Noise Spectrum for Transient
Noise
| |
|
Band Pressure Level Decibels re 0.0002
Microbars
|
Octave Band Center Frequency Cycle Per
Second
|
|
92
|
63
|
|
87
|
125
|
|
79
|
250
|
|
72
|
500
|
|
66
|
1,000
|
|
60
|
2,000
|
|
54
|
4,000
|
|
52
|
8,000
|
|
During the daytime, from 7:00 a.m. to 7:00 p.m.,
the limits of Table I hereinbefore set forth shall apply to transient
noises having a duration in excess of 12 seconds. During the night,
from 7:00 p.m. to 7:00 a.m., the same limits shall apply to transient
noises having a duration in excess of six seconds.
|
|
TABLE II
| |
|---|---|
|
Limiting Noise Spectrum for Steady Noise
| |
|
Band Pressure Level Decibels re 0.0002
Microbars
|
Octave Band Center Frequency Cycle Per
Second
|
|
72
|
63
|
|
67
|
125
|
|
59
|
250
|
|
52
|
500
|
|
46
|
1,000
|
|
40
|
2,000
|
|
34
|
4,000
|
|
32
|
8,000
|
Noise measurements and limits shall conform
to the following practices:
A.
Noise shall be measured at an altitude not exceeding
100 feet above sea level.
B.
Measurements of noise emanating from any mechanism
or device, including but not limited to motor vehicles, shall be made
at a distance of at least 100 feet from the longitudinal center line
of the vehicle.
