PA system audio playback call intercom broadcast function power amplifier speaker equipment.

Public address Broadcasting System, also known as public broadcasting service or public media, refers to the non-profit Electronic
Media established and operated by government budget or public funds, this kind of media mostly focuses on making and broadcasting
public policy discussions, culture, education and art or intellectual programs, aiming at improving national knowledge level and
promoting people to participate in political decision-making. Generally, news media controlled by the governments of
non-democratic countries are not called Public Media. Although this kind of TV stations are also supported by government funds,
these media generally lack the independence of editing and operation, the independence of broadcast content and operation is an
important symbol of public media. Because of non-profit, most of the public media do not broadcast commercial advertisements.
Besides the government, the operation funds also receive donations from individuals or groups, while some countries collect taxes
from users. Public media in some places not only provide TV broadcast, but also provide radio broadcast and Internet services.

Public Broadcasting System materials include loudspeaker, power amplifier, Power Manager, network audio player and other
equipment. The public broadcasting system includes background music and emergency broadcasting functions, which are usually
combined together. Its objects are public places, install combined sound column or distributed loudspeaker box in corridor,
elevator door, elevator car, Hall, shopping mall, restaurant, bar, banquet hall, community garden and so on to play background
music at ordinary times, when an emergency occurs, it is forced to be an emergency broadcast and used to command the evacuation of
people.

IP network public address broadcasting the pure digital network audio broadcasting system based on the internet and local area
network is different from the traditional broadcasting system of analog audio, frequency modulation, addressing and numerical
control broadcasting, streaming media (IP) the intelligent digital broadcasting system is fully compatible with the internet and
local area network. It can use the existing campus network or internal local area network without additional wiring, and the
embedded hardware terminal can set independent IP address, the setting and playing of each terminal can be controlled arbitrarily
through the multi-layer switch and the host, and the required program content can be selected on the terminal; Due to the adoption
of computer technology, the system is compatible with almost all audio formats and adopts IP technology. The content of the
programs played can be without any restriction, and each terminal can play the required program content at will. It can completely
replace the traditional intelligent broadcasting system based on analog or digital, truly realize the IP audio broadcasting
function based on Internet or local area network, and support Broadcasting, live broadcasting, on-demand and other ways, some
products support functions such as full duplex two-way intercom and terminal speech, and support wide popularization and
application.

The public broadcasting system includes background music and emergency broadcasting functions, which are usually combined
together. Its objects are public places, install combined sound column or distributed loudspeaker box in corridor, elevator door,
elevator car, Hall, shopping mall, restaurant, bar, banquet hall, community garden and so on to play background music at ordinary
times, when an emergency occurs, it is forced to be an emergency broadcast and used to command the evacuation of people.