§ 122-1144. Noise.

(a)

For the purpose of measuring the intensity and frequency of sound, the SLM and OBF shall be used. In the enforcement of this section, noises produced by the operation of motor vehicles or other transportation facilities shall not be included in determining the maximum permitted decibel levels. Sounds of short duration, such as those from forge hammers and punch presses, shall be measured with the INF. For sounds so measured, the maximum sound pressure level set forth in the table may be increased by six decibels.

(b)

In the M-1, M-2 and M-3 districts, the decibels resulting from any activity, whether open or enclosed, shall not exceed, at any point on or beyond any plot line, the maximum level set forth in the table in subsection (c) of this section. If the M-1, M-2 or M-3 district adjoins a residential district, the maximum levels at any point on the district boundary shall be reduced by six decibels from the maximum listed.

(c)

The following table shows the maximum permitted sound pressure level in decibels:

Octave Band (cycles per second)	Sound Pressure Level (decibels)
0—74	79
75—149	74
150—299	66
300—599	59
600—1,199	53
1,200—2,399	47
2,400—4,799	41
4,800 and over	39

 

(Code 1961, § 22-14(4); Code 1985, § 7-964; Ord. No. 2275, § 52, 5-5-92)

Cross reference

Noise generally, § 34-171 et seq.