Section 42-413 - Maximum permitted decibel levels
In all Manufacturing Districts , the sound pressure level resulting from any activity, whether open or enclosed, shall not exceed, at any point on or beyond any lot line , the maximum permitted decibel levels for the designated octave band as set forth in the following table for the district indicated.
In the enforcement of this regulation, sounds produced by the operation of motor vehicles or other transportation facilities shall not be included in determining the maximum permitted decibel levels.
MAXIMUM PERMITTED SOUND PRESSURE LEVEL (in decibels )
District Octave Band (cycles per second) M1 M2 M3 20 to 75 79 79 80 75 to 150 74 75 75 150 to 300 66 68 70 300 to 600 59 62 64 600 to 1,200 53 56 58 1,200 to 2,400 47 51 53 2,400 to 4,800 41 47 49 Above 4,800 39 44 46