The provisions of this regulation may not apply to devices used solely for the purpose of warning, protecting, or alerting the public, or some segment thereof, of the existence of an emergency or hazardous situation. The provisions of this regulation do not apply to the following: Household tools and portable appliances in normal usage during daytime hours; Lawn care and snow removal equipment (daytime only) when used between the hours of 7:00 a.m. to 9:00 p.m. and maintained in accordance with the manufacturer's specifications; Agricultural field machinery when used and maintained in accordance with manufacturer's specifications on more than five (5) acres or outside of one hundred (100) feet of the property line; Blasting operations for demolition, construction, and mining or quarrying (daytime only); Motor vehicles on public roads; Aircraft and related airport operations at airports licensed by the Maryland Aviation Administration; Boats on State waters or motor vehicles on State lands under the jurisdiction of the Department of Natural Resources; Emergency operations; Pile driving equipment during the daytime hours of 8 a.m. to 5 p.m.; Sound, except those sounds that are electronically amplified, between 7 a.m. and midnight, created by: Sporting events (except trap shooting, skeet shooting, or other target shooting); Entertainment events; and Other public gatherings operating under permit or permission of the appropriate local jurisdiction; Rapid rail transit vehicles and railroads; Construction and repair work on public property; Air conditioning or heat pump equipment used to cool or heat housing on residential property; for this equipment, a person may not cause or permit noise levels which exceed 70 dBA for air conditioning equipment at receiving residential property and 75 dBA for heat pump equipment at receiving residential property; Household pets on residential property that are maintained in accordance with local zoning requirements; Trap shooting, skeet shooting, or other target shooting between the hours of 9 a.m. and 9 p.m. on a range or other property of a shooting sports club that is chartered and in operation as of January 1, 2001; Trash collection operations between the hours of 7 a.m. and 10 p.m. Marina equipment used to move boats during the period from 7 a.m. to 7 p.m. provided that the noise level does not exceed 80 dBA at 20 meters from the equipment; or A source or condition expressly subject to any State or federal noise-control law or regulation that is more stringent than this Division. The events and gatherings under paragraph (b)(10) include, but are not limited to, athletic contests, amusement parks, carnivals, fairs at fairgrounds, sanctioned auto racing facilities, parades, demonstrations, and public celebrations.