Leesburg's noise ordinance does not rely on decibel levels for enforcement purposes. Rather, it uses a variety of standards depending on the type of sound in question. Certain types of sounds, like amplified music, are regulated based on whether or not they can be heard from certain distances away from the source property. Other sounds, like lawnmowers or some types of construction equipment, are regulated only by the hours during which they may occur. Other types of sounds, like emergency vehicle sirens or noise associated with certain types of governmental activities, are exempt from regulation.