§ 46-951. Noise.

(a)

No activity in an M-2 general manufacturing district and in a Q-1 quarrying/extractive district shall produce a sound level outside the district boundary that exceeds the following sound level measured by a sound level meter and associated octave band filter:

Octave Band Frequency (cycles per second)	Sound Level (decibels)
0 to 75	79
75 to150	74
150 to 300	66
300 to 600	59
600 to 1,200	53
1,200 to 2,400	47
2,400 to 4,800	41
Above 4,800	39

 

(b)

No other activity in any other district shall produce a sound level outside its premises that exceeds the following:

Octave Band Frequency (cycles per second)	Sound Level (decibels)
0 to 75	72
75 to150	67
150 to 300	59
300 to 600	52
600 to 1,200	46
1,200 to 2,400	40
2,400 to 4,800	34
Above 4,800	32

 

(c)

All noise shall be so muffled or otherwise controlled as not to become objectionable due to intermittence, duration, beat frequency, impulse character, periodic character or shrillness.

(d)

All sirens, whistles, and bells which are maintained and utilized solely to serve a public purpose are exempt from the sound level standards of this section.

Cross reference

Loud and unnecessary noise, § 66-6.