Audio-Visual Systems refer to the combination of sound and visual components used to enhance communication and presentation. These systems typically include devices such as microphones, speakers, projectors, and screens to deliver information effectively in various settings, including classrooms, conference rooms, and entertainment venues. These systems can be simple, like a home theater setup, or complex, like those used in large auditoriums. They are designed to create an engaging experience by synchronizing audio and visual elements, making it easier for audiences to understand and retain information during presentations, performances, or events.