Is the public broadcasting service to the public in a certain area of the broadcast, for all kinds of press release and internal information transfer and release schedule signal, provide background music as well as for the call and forced into disaster emergency broadcast and so on, which is also part of various public places in urban and rural areas and in the modern city indispensable.

The scope of public broadcasting applications can be broadly divided into four categories:

Public area such as shopping malls, stations, terminals, shopping malls, corridors, teachers and parking lot broadcasting system. This system is mainly used for voice broadcasting, so clarity is the primary. Moreover, this system is usually broadcast background music, in the event of a disaster or emergency, and can be converted to an emergency broadcast.

Two, hotel guest room broadcast system. This system includes room audio broadcasting and emergency broadcast, usually located in the rooms in the bedside rooms containing a plurality of radio broadcasting, available for free choice in the band, emergency broadcast, broadcast room automatically interrupted, automatically switch to the emergency broadcast.

Three, hall sound reinforcement system. A broadcasting system in a hall, theater, gymnasium, etc. These local broadcasting system requires a professional sound reinforcement system, it should not only consider the electroacoustic technology, but also involves the construction of acoustic problems. Both are to be balanced, can not be neglected, this kind of broadcasting system often has comprehensive multi-purpose requirements, not only for the use of sound language, is often used for theatrical performances, the sound system performances of large electric power field, ranging from tens of thousands, many hundreds of thousands of watts. It is necessary to use high-power speakers and power amplifier, the system configuration and equipment selection has certain requirements, while attention should be paid to the load of power lines.

Four, conference room, lecture hall broadcast sound system. This kind of system is usually set up to provide the background music and emergency broadcasting system, but because of its particularity, it is often set up in the conference room and lecture hall conference broadcast system. For the higher requirements or the international conference hall, the need for the design of other systems such as simultaneous interpretation system, conference voting system and large screen projection TV, etc..

The function of public broadcasting system can be divided into three types:

1 business broadcasting system

Commercial broadcasting of office buildings, commercial office buildings, schools, hospitals, railway passenger stations, airports, stations, banks and factories to meet the operational and administrative requirements of the business broadcasting requirements.

2 service broadcasting system

Hotels, hotels, shopping malls, entertainment facilities and large public places to set up service broadcast. The scope of the service broadcasting is the background music and the guest room program broadcast, the purpose is to provide people with the appreciation of music radio programs, to serve as the main purpose. Hotels and other service radio programs generally choose 4 sets. The content of the broadcast program shall be determined according to the service object and the project level.

3 fire incident broadcast system

Mainly used in fire or accident for emergency notification and evacuation guidance.

In general, the function of broadcasting system is not single, the application of fire accident is less, but it is an indispensable function. While the business broadcasting system and the service broadcasting system play its role, but also can play the function of emergency management.

Attention should be paid to the use of public broadcasting system:

1, the use of conditions

Pay special attention to the following matters: avoid the use of the machine in the extremely low or high temperature environment, avoid direct exposure to sunlight has been the surface of the machine; avoid using the machine in a humid environment, so as to avoid the premature failure of components in the machine or machine early rust; before use must ensure that the local power supply voltage and the machine.

2, the use of the environment

Avoid dust and vibration environment in the use of the machine; in the machine should be left enough space around, in order to facilitate the heat of the machine; for power amplifier, special attention should be paid to keep the flow of the cooling channel.

3, the use of instructions

In the course of use, should pay attention to the boot, shutdown order. When you start, you should first open the audio source and other equipment, and then open the power amplifier; shut down, you should turn off the power amplifier, and then off the sound source and other front-end equipment. Audio equipment if the volume knob, boot and shutdown, close to the smallest volume knob at the best. The purpose of doing so is to reduce the impact on the speaker when the power is turned on and off.

Strictly prohibit pulling and inserting the signal plug. In order to avoid electric shock resulting from damage to the machine or box; the working process of the machine if an exception, should immediately turn off the power, stop using; operation personnel do not understand their maintenance technology, do not open the machine, so that the machine suffered more damage, or cause an electric shock accident.

4, maintenance work

Do not use volatile solution to clean the machine, such as gasoline, alcohol and other cleaning machine surface, wipe with a soft cloth. And clean the machine shell to unplug the power. The machine is generally not waterproof, in case of wet water, to be dry after the water, in order to boot; do not put heavy objects on the machine, so as not to machine deformation.

In our life, we will all get from many aspects appear around the relatively large security matters, as long as the use of the process, pay attention to eliminate security risks, will let the public broadcasting play its greater practical value. Because there is no small security issues, to ensure national security is an important prerequisite for doing everything.