There are two kinds of sound reinforcement systems in the meeting place, one is the multi-function hall sound reinforcement system, and the other is the conference sound reinforcement system. In addition to meeting, reporting and other activities, the multi-function conference room is also a place for employees to engage in recreational activities, such as singing and dancing, music, drama and other artistic performances. It requires high-quality sound reinforcement system to cooperate with it, and strive to restore all kinds of sound sources as perfect as possible to ensure the smooth progress of all kinds of performances, so that actors and audiences can enjoy the sounds of nature in addition to the visual enjoyment, Enjoy the beauty of art, which requires the designed sound reinforcement system to have a higher and more uniform sound field design and better music signal clarity and fullness.

Audio processing equipment, power amplifier, tuning equipment, etc. Several sets of wireless handheld and lavalier microphones are equipped. Three points for attention are proposed:

1、 This kind of place is not a professional performance hall, and there is generally no architectural sound design on the building. It can only use soft decoration as far as possible through the requirements of decoration to obtain a better sound field and make the electro-acoustic meet the requirements. But some of them have no soft decoration, such as the courtroom of the court. Almost all the courtrooms in the country are 200-300 square meters in size, nearly 1000 square meters in size, and 5-7 meters in height. In order to reflect the solemnity, the decoration is made of hard materials, square and square, all of which are parallel to each other. The ground is terrazzo or wood floor, and the walls are all packed with hard wood. This kind of amplification is taboo to be equipped with large-diameter high-power speakers, Otherwise, the echo of the whole hall will make you unable to hear the speech clearly.

The correct way is to use the line array sound column with low total power and high sound pressure level to make the sound transmit far away, and then use the ceiling speaker to complete the clear and uniform amplification of the entire sound field under the precise control of each speaker and each channel of the media matrix.

2、 Use a howling feedback suppressor to ensure that the venue is not howling. However, for the same reason as the second point, and because the position of the user's microphone changes from time to time, it is better to use a frequency-shift whistling feedback suppressor for the conference speech audio. To avoid the impact of frequency shift on music, conference microphones can be grouped and connected to the frequency shift whistling feedback suppressor, and then mixed into the main channel, or the frequency shift whistling feedback suppressor can be connected to the digital conference analog audio output, and then enter the mixer or media matrix.

3、 General units do not have a professionally trained tuner. Audio processing cannot be set too frequently. Otherwise, the sound field effect produced by painstaking efforts will be almost unrecognizable after a few months. It is better to use a more intelligent processor or even audio media matrix to process all kinds of audio, and use all kinds of applications such as conferences, performances, musical instruments, cinemas and environmental parameters to be full, dissatisfied Half of the people and so on are combined into various applications and stored in advance. The problem of tuning is solved through scenario call (preferably connected to the centralized control system) to avoid excessive user adjustments.

When discussing the sound reinforcement of the system hand in hand, the voice is generally required to be clear and bright, with high intelligibility and melodious background music. Therefore, sound columns, wall-mounted speakers, ceiling speakers, etc. with moderate power and high sound pressure are generally used, and frequency-shift whistling feedback suppressors are mostly used in audio processing.