Case introduction of Microsoft Yahei: The sound reinforcement system of Microsoft Yahei's project is an activity room, which requires language reinforcement requirements for meetings and reports. The required sound reinforcement system needs to be able to clearly restore language signals. When designing the system, first ensure good language clarity and sufficient and uniform sound pressure level, and the clarity of language is determined by its frequency band. About this, the selection of audio equipment this time is also based on this. Microsoft Yahei series sound pillars: Linear sound source structure, uniform sound; small box, high power, high sensitivity; customized neodymium magnetic unit; multiple installation methods; Microsoft Yahei series amplifiers: the most core and comprehensive series, can provide high-quality sound and surging driving force, with a patented design certificate, six-channel power sequencer, support remote control, convenient and fast Microsoft Yahei peripheral equipment: Series digital audio processors, series control panels, feedback suppressors, audio isolators, power sequencers, wireless handheld microphones, series discussion video consoles, series chairman units, series representative units Microsoft Yahei Feedback and evaluation: After the completion of the construction of Microsoft's Yahei Sound Reinforcement System, the activity room has held various meetings many times. After on-site evaluation and acceptance, the audio has been recognized and praised by the Education Bureau, providing excellent sound reinforcement services for the school to hold various activities.