(A) (1) Sound levels shall be measured with a sound level meter and associated octave band filter manufactured according to standards prescribed by the American Standards Association.
(2) Measurements shall be made using the flat network of the sound level meter.
(3) Impulsive type noises shall be subject to the performance standards prescribed in this section; provided that, such noises shall be capable of being accurately measured with such equipment.
(4) Noises capable of being so measured, for the purpose of this subchapter, shall be those noises which cause rapid fluctuations of the needle of the sound level meter with a variation of no more than plus or minus two decibels.
(5) Noises incapable of being so measured, such as those of an irregular and intermittent nature, shall be controlled so as not to become a nuisance to adjacent uses.
(B) At no point on the boundary of a residence or business district shall the sound intensity level of any individual operation or plant (other than the operation of motor vehicles or other transportation facilities) exceed the decibel levels in the designated octave bands shown on the following table:
Octave Band (Frequency Cycles per Second) | Maximum Permitted Sound Level (decibels) | |
Along Residence District Boundaries | Along Business District Boundaries | |
Octave Band (Frequency Cycles per Second) | Maximum Permitted Sound Level (decibels) | |
Along Residence District Boundaries | Along Business District Boundaries | |
0 to 75 | 72 | 75 |
75 to 150 | 67 | 70 |
150 to 300 | 59 | 63 |
300 to 600 | 52 | 57 |
600 to 1,200 | 46 | 52 |
1,200 to 2,400 | 40 | 45 |
2,400 to 4,800 | 34 | 40 |
Over 4,800 | 32 | 38 |
(Prior Code, § 156.178) (Ord. 610, passed - -1965)