Norman, OK Noise from Specific Sources: Car Alarm Limits (2026)

NCC 16-208(b)'s 'Emergency-type alarms' clause is Norman's only alarm-specific noise rule, and it does not carve out vehicle alarms separately, so a car alarm is covered as one more electronically amplified alarm signal. The rule: "The sounding, operating or permitting to sound or operate an electronically amplified signal from an alarm which fails to meet the sound level standards set forth in NCC 16-205 for more than 15 minutes in any hour; or the testing of such emergency alarm which fails to meet the sound level standards set forth in NCC 16-205 for more than five minutes in any 24-hour period.

" In practice, a car alarm that keeps sounding past 15 minutes in an hour above the NCC 16-205 decibel ceiling, roughly 50 dB(A) at night and 55 dB(A) by day in residential districts, is a citable violation regardless of who owns the vehicle or whether it was triggered accidentally. is barred outright, with no decibel or duration exception. The Police Department, which handles noise complaints under this article, measures with a Type II sound meter per NCC 16-207 when a reading is needed, though a prolonged, obviously audible alarm can also support a citation on the 'noise disturbance' standard alone.