545.13 EXCESSIVE NOISE DEFINED.
   (a)   "Excessive noise," as used in this chapter, means any noise, or combination of noises, emanating from any source at a decibel level exceeding that herein described for each designated zoning specification, as follows:
 
Zoning Designation of the Property on on Which the Noise Source is Located
Maximum Decibel Level Permitted
U1, U2
55
All U3 and ASF Districts
55
U4, U5, all R Districts
65
U6, U7, U8
70
 
   (b)   "Decibel," as used in this section, means the unit for measuring the volume of sound, equal to twenty times the base ten logarithm of the ratio of the measured pressure of a particular sound over a reference pressure of twenty micropascals (twenty micronewtons per square meter).
(Ord. 166-1994. Passed 6-20-94.)