(1) it's a violation of this statute to do any of the following:

(a) use on a vehicle, any bell, siren, compression or exhaust whistle

(b) use a horn otherwise than as a reasonable warning or make any unnecessary or unreasonably loud or harsh sound by means of a horn or other warning device

(2) authorized emergency vehicles and ambulances are not subject to this section but are subject to 820.370 (Ambulance or emergency vehicle sirens) and 820.380 (Illegal ambulance or emergency vehicle sirens)