As used in this chapter, the following terms shall have the
meanings indicated:
ACOUSTICAL TERMINOLOGY
Used throughout this section, is that most recently approved
as American Standard Acoustical Terminology by the American National
Standards Institute (ANSI).
AVERAGE BACKGROUND NOISE
The average of at least five sound-level measurements, absent any noise as defined in §
115-2, measured in dBA at intervals of one minute or more by a Type 2 sound-level meter set at slow meter response. Said measurements shall be taken at the same location as measurements of allegedly excessive noise.
dBA or dB(A)
The A-weighted sound-pressure level in decibels as measured
by a general-purpose (Type 2) sound-level meter complying with the
provisions of ANSI Standard S1.4-1971. Specifications for Sound Level
Meters, as most recently amended.
TYPE 2 SOUND-LEVEL METER
Any sound-level meter complying with said provisions. Any
meter used to make measurements under the provisions of this chapter
shall be properly calibrated to ensure that it meets ANSI Standard
S1.4-1971 and shall be operated on the "A" weighting network.
The provisions of this section shall not apply to warning devices,
such as horns or sirens; to emergency equipment or vehicles, such
as fire engines, ambulances, police and rescue vehicles and the like;
to motor vehicles operated lawfully in accordance with the provisions
of the Federal Noise Control Act of 1972 as amended; to snow plows
or other municipal equipment while in operation; to the Great Barrington
airport; to church bells; or to lawful activities of temporary duration,
including but not limited to parades, firework displays, concerts,
target shooting or hunting.