In this subtitle, the following words have the meanings indicated. “Alarm system” means a burglary or robbery alarm system. “Audible alarm system” means any alarm system with an audible annunciator, such as a horn, bell, or siren. “Public nuisance alarm” means an audible alarm system that sounds continuously for more than 15 minutes. “Public nuisance alarm” does not include an audible alarm system installed in a motor vehicle. City Code, 1976/83, art. 19, §28A(a) Ord. 97-211 Ord. 02-329 Ord. 22-125