Any production, processing, cleaning, testing, repairing, moving or storing of materials, goods or products; sound amplification systems; motor vehicles; or sound  emanating from other activities within the City, shall be so operated as to conform with the sound pressure level standards set forth in this chapter.  Aircraft and municipal or other governmental equipment are exempt from the application of this chapter.  Sound created by construction or building repair of any premises within the City shall be exempt from the application of this chapter during the hours of 7:00 a.m. to 8:00 p.m.  Sirens, whistles, bells, etc., which are maintained and utilized solely to serve a public purpose (such as fire, ambulance, police, air raid or tornado warning sirens, church bells or chimes) shall be exempt from the application of this chapter.
(1964 Code Sec. 99.03)