(a) Sounds made by warning devices to protect persons or property from imminent exposure to danger, provided however that burglar or fire alarms shall not operate continuously for more than fifteen minutes.
(b) Sounds made by an emergency vehicle, as defined in ORS 801.260, when responding to or from an emergency or when in pursuit of an actual or suspected violator of the law.
(c) Sounds produced pursuant to a specific variance granted by the Oregon Environmental Quality Commission, or by the city manager or hearings official under subsection (2) of section 6.755 of this code.
(d) Sounds caused by sources regulated as to sound production by federal law or sounds caused by sources the regulation of which is preempted by state law.
(e) Sounds not electronically amplified, created by athletic and entertainment events other than motor vehicle racing events or fireworks displays.
(f) Electronically amplified announcements at athletic events other than motor vehicle racing events.
(g) The sounding of any horn or signaling device on an automobile, motorcycle, or other vehicle reasonably required by the exigencies of vehicular or pedestrian traffic.
(h) Sounds specifically authorized under a permit or license issued by the city.