Classroom sound reinforcement uses basic infrared(IR) technology for wireless transmission between mic and mixer/amp. This introduces a cost effective way for teachers to have an even vocal presence throughout the room without risk of straining their voice. IR technology only operates in line of sight, allowing every classroom to have a voice lift system without interference. Additional inputs are usually available on the mixer for DVD and laptop audio which completes the classroom experience.
Extron Electronics offers a complete audio/video classroom reinforcement system called PoleVault. Using a control wall plate(see below) the teacher can choose between 4 separate audio/video inputs and the adjust volume. Power for the projector or display can also be switched using the wall plate which eliminates remote controls. The PoleVault is VoiceLift capable.
-Many more are not