With the rapid development of science and technology, various technological achievements are constantly applied in our expanding needs in various fields, which is refreshing our life and work. The rise of global village constantly reveals the connection of everything by means of Internet and Internet of things. Whether it is aircraft, high-speed rail, telephone or Internet, they have become an important carrier to hold up the new global village. How to close the relationship between people, how to establish a more effective way of contact, improve the efficiency of remote collaborative work and information transmission has become an important proposition.

The emergence of teleconference provides a high-quality platform for this kind of multi polarization office interaction to a large extent. With the help of the Internet convenient remote communication architecture, the communication data is safe, stable and reliable, and has been widely favored by users for a long time.

However, the drawback of such a system is still the problem of natural acoustics. In a chat with friends in the industry, it is said that in the future, the sound reinforcement system may only retain two levels of traditional devices, that is, the pickup and restoration of acousto electric conversion and electro acoustic conversion. It is these two levels of physical acoustic phenomena that make up what we are discussing today.

In the terminal (local) of teleconference system, in order to realize the purpose of multi person interaction and multi person pickup, the system voice can not avoid being amplified and restored. In such amplification system, only the local speaker can hear the remote voice, and can transmit the local pickup signal to the remote for intercommunication.