(a)   The City Council finds that excessive is injurious to the public health, safety and welfare, interferes with the quiet enjoyment of life and property, and interferes with the tranquility and privacy of the home. Accordingly, the city has a compelling interest in imposing time, place and manner restrictions on such on a content neutral basis and in a manner that does not unreasonably infringe on the rights of the city’s inhabitants and visitors to engage in free speech or the free exercise of religion.
   (b)   The following words and terms when used in this Article IV shall have the following meanings unless the context clearly indicates otherwise.
      A-WEIGHTED SOUND LEVEL. A specific weighting of the for the purpose of determining the human response to . The specific weighting characteristics and tolerances are those given in the American National Standards Institute (ANSI).
      AMBIENT NOISE LEVEL. The that exists at a point of measurement in the absence of the from the source of interest, the emission of which is being measured, constituting the total effect of all other coming from near and far. The total of all in the environment, other than the from the source of interest.
      CITY OFFICIAL. Any duly authorized representative of the city as designated by the City Manager.
      COMPRESSION ENGINE BRAKE. A braking system on an internal combustion engine powered vehicle that allows the driver to remove portions of the vehicle’s engine compression from service by exhausting compressed engine gasses from the cylinders before they have a chance to force the cylinder back down thus depriving the engine of power and slowing the vehicle, but also creating a loud roar or growling .
      HIGHWAY. Any street, road or public way in the city.
      L10 LEVEL. The , expressed in dBA, which is exceeded 10% of the time for a one-hour survey, as measured by test procedures approved by the .
      MOTOR VEHICLE. Any self-propelled vehicle not operated exclusively upon railroad tracks and any vehicle propelled or drawn by a self-propelled vehicle and including vehicles known as trackless trolleys which are propelled by electric power obtained from overhead catenary wires but not operated upon rails, except snowmobiles.
      NOISE. Any erratic, intermittent and/or statistically random oscillations which result in disturbing, harmful or unwanted .
      PERSON. An individual, firm, partnership, corporation, trustee, association, the state and its agencies and subdivisions, or any body of persons whether incorporated or not. And, with respect to acts prohibited or required herein, PERSON shall include employees and licensees.
      SLEEPING FACILITY. Any structure or property normally used on a regular basis for overnight lodging, including without limitation hotels, motels, boarding houses and campgrounds.
      SOUND. A temporal and spatial oscillation in pressure or other physical quantity in a medium with internal forces which causes compressions and rarefactions of that medium and which is propagable at finite speed to distant points.
      SOUND LEVEL (NOISE LEVEL). The , expressed in dBA, obtained by use of a -level meter having characteristics as specified in the American National Standards Institutes (ANSI) Standard S1-4-1961.
      SOUND PRESSURE LEVEL (SPL). Expressed in decibels (dB), is 20 times the logarithm to the base ten of the ratio of the observed pressure to a reference pressure of 20 micropascals.
(1958 Code, § 166.01)  (Ord. 168, passed 1-8-1952; Ord. 75-49, passed 9-22-1975; Ord. 2005-29, passed 7-18-2005)