No person operating or occupying a motor vehicle on a street, highway, alley, parking lot, or driveway shall operate or permit the operation of any sound amplification system from within the vehicle so that the sound is plainly audible at a distance of 50 or more feet from the vehicle.

(Ord. 334, Sec. 1)

(a)   Sound amplification system means any radio, tape player, compact disc player, loudspeaker, or other electronic device used for the amplification of sound.

(b)   Plainly audible means any sound produced by a sound amplification system from within the vehicle, which clearly can be heard at a distance of 50 feet or more. Measurement standards shall be by the auditory senses, based upon direct line. of sight. Words or phrases need not be discernible and base reverberations are included. The motor vehicle may be stopped, standing, parked or moving on a street, highway, alley, parking lot, or driveway.

(Ord. 334, Sec. 1)

It is an affirmative defense to a charge under this section that the operator was not otherwise prohibited by law from operating the sound amplification system, and that any of the following apply:

(a)   The system was being operated to request medical or vehicular assistance or to warn of a hazardous road condition;

(b)   The vehicle was an emergency or public safety vehicle;

(c)   The vehicle was owned and operated by the city or a gas, electric, communications or refuse company;

(d)   The system was used for the purpose of giving instructions, directions, talks, addresses, lectures or transmitting music to any persons or assemblages of person in compliance with the ordinances of the city;

(e)   The vehicle was used in authorized public activities, such as parades, fireworks, sport events, musical productions and other activities which have the approval of the department of the city authorized to grant such approval.

(Ord. 334, Sec. 1)