(A) No use in any permissible business or industrial district may generate noise that tends to have an annoying or disruptive effect upon uses located outside the immediate space occupied by the use if that use is one of several located on a lot, or uses located on adjacent lots.
(B) Except as provided in division (F), the table set forth in division (E) establishes the maximum permissible noise levels for uses in the L-1 District. Measurements shall be taken at the boundary line of the lot where the use is emitting the noise is located, and as indicated, the maximum permissible noise levels vary according to the zoning of the lot adjacent to the lot on which the noise use is located.
(C) A decibel is a measure of a unit of sound pressure. Since sound waves having the same decibel level sound louder or softer to the human ear depending upon the frequency of the sound wave in cycles-per-second an A-weighted filter constructed in accordance with the specifications of the American National Standards Institute, which automatically takes account of the varying effect on the human ear of different pitches, shall be used on any sound level meter taking measurements required by this section. And accordingly, all measurements are expressed in dB(A) to reflect the use of this A-weighted filter.
(D) The standards established in the table set forth in division (E) are expressed in terms of the equivalent sound level (Leq), which must be calculated by taking 100 instantaneous A-weighted sounds levels at ten-second intervals.
(E) Table of maximum permitted sound levels, dB(A) emitting from industrial or businesses:
Residential | Commercial | Industrial |
50 | 55 | 60 |
(F) (1) Impact noises are sounds that occur intermittently rather than continuously.
(2) Impact noises generated by sources that do not operate more than one minute in any one-hour period are permissible up to a level of 10 dB(A) in excess of the figures listed above in division (E), except that this higher level of permissible noise shall not apply from 7:00 p.m. to 7:00 a.m. when the adjacent lot is zoned residential.
(3) The impact noise shall be measured using the fast response of the sound level meter.
(Ord. passed 12-20-2001) Penalty, see § 152.999