In May 2021, the National Bureau of Disease Control and Prevention was officially launched at No. 14 Zhichun Road, Haidian District, Beijing. The establishment of the National Bureau of Disease Control and Prevention means that the functions of disease control institutions have changed from simply preventing and controlling diseases to comprehensively safeguarding and promoting the health of the whole population, and the new institutions will assume five major functions, including formulating policies for the prevention and control of infectious diseases. As a result, more and more meetings of all kinds need to be held in a timely manner, and it is essential to have a lecture hall with clear sound, easy to operate, and safe and stable.
Project Overview
This project is located in the lecture hall of the National Bureau of Disease Control and Prevention, which is used to provide excellent sound quality, clear picture display and simple and convenient centralized control for various conferences, academic discussions, speeches, reports, press releases, multi-professional teaching and training activities. The lecture hall is an independent space with advanced multi-display system, professional sound reinforcement system, high-definition recording and live broadcast system and intelligent centralized control system. Tianchuang Group is building conference and sound reinforcement system for this project, for which we have selected adjustable directional column speakers, digital mixers, digital amplifiers, main and backup systems, analog and digital signals, to maximize the advancement and stability of the system. 
Solution
The sound reinforcement system adopts the combination of main reinforcement + ceiling. Due to the limitations of the installation location and installation method,The main amplifier is mounted on the wall of Renkus-Heinz ICL-F-RD and installed on the splayed wall of the platformIt not only ensures aesthetics, but also meets functional requirementsThe function of adjustable directivity and the variable characteristics of the acoustic center can achieve good direct sound coverage and sound restoration even under the condition of high installation position and long reverberation time. The return speakers and ceiling speakers are RENKUS-HEINZ CX81It is used to supplement the direct sound coverage of the rostrum area and the middle and back court areasAs a result, the sound reinforcement area of the whole field has achieved a good coverage effect, and the technical parameters such as sound pressure level and sound field unevenness are designed in accordance with the national standard conference class. 
Tianchuang engineers configured the system with a combination of one main and one standby digital mixing consoles, two adjustable directional column speakers, and four BIAMP Community ALC-404D digital power amplifiers. In terms of link design, from the mixer to the sound column to the power amplifier, analog and digital dual links are used for transmission. Through the transmission of analog signals and Dante signals separately, the stability of the system is improved while ensuring the advancement, and a safe and reliable sound reinforcement system is provided for the lecture hall, which can make all kinds of meetings such as conferences, reports, and press releases go smoothly. 
Acceptance
Through the introduction and training of the functions of the system, customers can have a clear understanding of the functions and operation methods of each product. The customer was satisfied with the results and met expectations.