FM System
Pick up desired sounds via microphones and transmit them to individual FM receivers, while reducing other sounds and avoiding distortion and reverberation. This system allows the user to control the volume of the transmitted signal. (see details for picture)
Loop Systems
Transmit sounds by creating a magnetic field inside a wire loop circling all or part of a room; people inside the loop receive the sounds through their telecoil-equipped hearing aids or by using a loop receiver. This system allows the user to control the volume of the transmitted signal.