Aimed at providing environmental music, calls and announcements
with comfort and quality. This type of system is very common in
shopping malls, schools, stores, supermarkets, airports, bus station
terminals, movie theaters and commercial buildings.
It is basically formed by loudspeakers, bugles, acoustic amplifier,
microphone, amplifier, pre-amplifier, CD player, AM/FM tuner, electronic
gong, mixer, etc.