Microsoft Yahei case introduction: Microsoft Yahei school playground sound reinforcement system needs to meet the needs of daily flag-raising sports meeting broadcasting and performance activities, the uniformity of sound pressure and clarity of sound field of the speaker need to be considered. Considering that this venue is an outdoor activity venue, it is relatively more difficult to process the sound field than indoor performances. Outdoor performances are open-style, there are no specific anti-sound buildings, and the sound spreads out without reflection, so powerful power and speakers with good directivity are needed. On the premise of ensuring safety and smoothness, open-air performances must also consider the stability, reliability and practicality of the system. Microsoft Yahei Solution: Microsoft Yahei Series slightly: High-quality unit configuration, patented linear horn, beautiful sound quality, accurate projection. Coupled with a series of bass slightly, using patented dual voice coil differential drive technology and high-peak-to-peak offset, it can show true and perfect ultra-low frequency sound. Microsoft Yahei Series Power Amplifiers: Unique LCD working display panel design monitors and displays working temperature, working time, and working voltage, providing reliable data for sound engineers to judge the working status of the equipment. Microsoft Yahei Microphones: A series of microphones are adopted. The receiver and transmitter use LCD display to provide real-time feedback on the working status of the system. And chorus microphones, which are resistant to mobile phones, electromagnetic and high-frequency interference. Microsoft Yahei Peripheral: It adopts audio isolator, power sequencer, and feedback suppressor. Its powerful processing functions can meet system needs. Microsoft Yahei Feedback and Evaluation: Microsoft Yahei Audio System meets the needs of sound reinforcement systems such as outdoor performances and meetings., and improves the school's teaching quality. The entire Microsoft Yahei system is smooth and stable to use, and has good sound quality. The school has given great recognition.