555.06 IMMEDIATE THREATS TO HEALTH AND WELFARE.
   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 Table 2 or Table 3 when measured at a distance of fifty feet or fifteen meters from such source.
TABLE 2. CONTINUOUS SOUND LEVELS WHICH
POSE AN IMMEDIATE THREAT TO
HEALTH AND WELFARE MEASURED AT
FIFTY FEET OR FIFTEEN 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 twenty-four hours.
TABLE 3. IMPULSIVE SOUND LEVELS WHICH POSE
AN IMMEDIATE THREAT TO HEALTH AND
WELFARE MEASURED AT FIFTY FEET OR
FIFTEEN METERS.
 


Sound level limit (dB)
Number of repetitions per twenty-four
hour period
145
1
135
10
125
100
 
(Ord. 77-126. Passed 5-2-78.)