§ 105-97. Noise.

A. 

Definitions. For the purpose of this section, the following terms are defined as follows:

DECIBEL

A unit of measurement of intensity of sound (the sound-pressure level).

OCTAVE BAND

A means of dividing the range of sound frequencies into octaves in order to classify sound according to pitch.

OCTAVE-BAND FILTER

An instrument, standardized by the American Standards Association, used in conjunction with a sound-level meter to take measurements in specific octave bands.

SOUND-LEVEL METER

An instrument, standardized by the American Standards Association, used for measurement of the intensity of sound and calibrated in decibels.

B. 

Method of measurement. For the purpose of measuring the intensity and frequencies of sound, sound-level meters and octave-band filters shall be employed. Sounds of short duration which cannot be measured accurately with the sound-level meter shall be measured with the impact noise filter as manufactured by the General Radio Company, or its equivalent, in order to determine the peak value of the impact.

C. 

Maximum permitted sound-pressure level.

(1) 

Table.

	Octave Band (cycles per second)	Sound-Pressure Level (decibels)
	0 - 74	60
	75 - 149	52
	150 - 299	50
	300 - 599	45
	600 - 1,199	40
	1,200 - 2,399	36
	2,400 - 4,799	31
	4,800 - 20,000	30

(2) 

In the ED-A District, the decibels resulting from any activity, whether open or enclosed, shall not exceed at any point on or beyond any lot line the maximum decibel levels for the designated octave band as set forth in the table above, and where the ED-A District lies within 200 feet of a district permitting residences, whether within or without the Village, the maximum permitted decibel levels at any point on or beyond the district boundary shall be reduced by six decibels from the maximum permitted level in the table.