No person shall operate, cause to be operated or permit on public or private property any source of continuous and/or impulsive sound in such a manner as to create a sound level which exceeds the limits set forth in Tables 3 or 4 when measured at a distance of fifty feet or fifteen meters from such source.
TABLE 3. CONTINUOUS SOUND LEVELS WHICH POSE AN IMMEDIATE
THREAT TO HEALTH AND WELFARE (MEASURED AT 50 FEET OR 15 METERS)*
Sound level limit (dBA) | Duration |
90 | 24 hours |
93 | 12 hours |
96 | 6 hours |
99 | 3 hours |
102 | 1.5 hours |
105 | 45 minutes |
108 | 22 minutes |
* Use equal energy time-intensity trade-off if level varies; find energy equivalent over 24 hours.
TABLE 4. IMPULSIVE SOUND LEVELS WHICH POSE AN IMMEDIATE
THREAT TO HEALTH AND WELFARE (MEASURED AT 50 FEET OR 15 METERS)
Sound level limit (dB) | Number of repetititions per 24 hour period |
145 | 1 |
135 | 10 |
125 | 100 |
(Ord. 66-76. Passed 12-6-76. )