Analysis of Application Range and Points of Attention of Public Broadcasting System

Public broadcasting is broadcasting that serves the public in a certain area. It is used to publish various news and internal information transmissions, to release work and rest signals, to provide background music, and to call and forcibly insert emergency broadcasts for disaster accidents. It is also urban and rural areas. Indispensable components of various public places in modern cities.

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

1. Broadcast systems in public areas such as shopping malls, stations, docks, shopping malls, corridors, teachers and parking lots. This system is mainly used for voice broadcasting, so the definition is first and foremost. Moreover, such systems often broadcast background music in peacetime and can be converted to emergency broadcasts in the event of a disaster or emergency.

Second, the hotel room broadcast system, this system includes room audio broadcasting and emergency radio, often carried by the bedside table in the room, the room broadcast contains a number of free choice of band, in the emergency broadcast, room broadcast is automatically interrupted , Automatically switch to emergency broadcast.

Third, the hall sound reinforcement system, refers to the auditorium, theaters, stadiums and other places broadcast system. The broadcast systems in these places require a professional sound reinforcement system, which not only considers electro-acoustic technology issues but also relates to architectural acoustics issues. Both of them must be taken into account in an integrated manner and must not be neglected. This kind of broadcasting system often has comprehensive and versatile requirements. It can be used not only for language reinforcement in venues, but also for theatrical performances, etc. For large-scale live performances of audio systems, less electric power is required. Tens of thousands of tens of thousands of watts. Therefore, it is necessary to use high-powered loudspeakers and power amplifiers, and there are certain requirements in terms of system configuration and equipment selection. At the same time, attention should be paid to the power line load problem.

Fourth, the conference room, lecture hall broadcast sound system, this type of system is generally set to provide public broadcasting background music and emergency broadcast dual-use system, but because of its particularity, it is often often set in the conference room and the lecture hall alone conference broadcast system. For higher requirements or international conference halls, special audiovisual systems such as simultaneous interpretation systems, conference voting systems, and large-screen projection televisions need to be designed separately.

The functions of the public address system can be divided into three types:

1. Business Broadcast System

Office buildings, commercial office buildings, schools, hospitals, railway passenger stations, airports, railway stations, banks, factories, and other buildings are provided with commercial broadcasts to meet business and administrative management-based business broadcasting requirements.

2. Service Broadcast System

Service broadcasts are provided for hotels, hotels, shopping arcades, entertainment facilities and large-scale public events. The scope of service broadcasting is background music and room program broadcasting. The purpose is to provide people with appreciation of music broadcasting programs with service as the main purpose. The hotel and other service broadcast programs generally choose 4 sets. The arrangement of broadcasting program content should be based on the service object and project level.

3. Fire accident broadcasting system

Used primarily for fire or accidents, for emergency notification and evacuation guidance.

The function of installing a broadcasting system in a general place is not a single one. After all, there are few application opportunities for fire accidents, but it is an indispensable function. While the operational broadcasting system and the service broadcasting system play their own roles, they can also function as emergency diffusion management at any time.

Public broadcasting system should pay attention to the use of:

1, the use of conditions

Special attention should be paid to the following: Avoid using the machine in extremely low or extremely high temperatures, avoid direct sunlight on the surface of the machine, and avoid using the machine in a wet environment to prevent premature failure of the internal components or premature operation of the machine. Rusty; Before use, make sure that the local power supply voltage matches the unit.

2, the use of the environment

Avoid using the machine in dust and vibration environment; there should be enough space around the machine to facilitate the heat dissipation of the machine; for the power amplifier, special attention should be paid to keep the cooling channel free.

3, instructions for use

During use, you should pay attention to the order of startup and shutdown. When turning on the power, you should turn on the front device such as the sound source before turning on the power amplifier. When turning off the power, turn off the power amplifier first, and then turn off the front device such as the sound source. If the audio equipment has a volume knob, turn the volume knob to the minimum before turning it on and off. The purpose of this is to reduce the impact on the speakers during startup and shutdown.

It is forbidden to pull and insert the signal plug. In order to avoid damage to the machine or speaker caused by the resulting electric shock, if abnormality occurs during the operation of the machine, the power should be turned off immediately to stop the use. If the operator does not understand the maintenance technology, he should not open the machine himself so as not to make the machine suffer greater damage. Damage or electric shock.

4, maintenance work

Do not use volatile solvents to clean the machine. For example, wipe the surface of the machine with gasoline, alcohol, etc. Use a soft cloth for dust. Also, unplug the power supply before cleaning the housing of the machine. The machine is generally not waterproof. In case of wet water, it is necessary to wait for the water to dry before starting work; do not place heavy objects on the machine to avoid deformation of the machine.

In our lives, we will obtain a variety of relatively large security issues in various areas. As long as we take note of the exclusion of potential safety hazards in the process of use, we will make public broadcasting play a bigger role. Practical value. Because security is not a trivial issue, ensuring national security is an important prerequisite for doing everything well.