Univox amplifiers are produced by Bo EDIN AB who are major players in the induction loop field. They are continuously developing new and improved loop amplifiers and professional measurement equipment.
The induction loop is a small cable that goes round the perimeter of a room or listening area and forms a loop. Both ends of the cable are connected to the output of a specialist design loop amplifier. A current from the loop amplifier powers the cable and the amplifier gets its signal from a direct sound source. This can be a microphone or a connection into a TV, PA system, laptop or DVD player.
The resulting electric current in the induction loop produces a magnetic field. The hearing aid user can pick up this field when they switch their hearing instrument to the T position. The user is then able to hear audible sound very clearly. Overspill may occur when a loop system is being used, whereby the signal from the loop reaches outside the loop area. This means that privacy cannot be guaranteed in a room where a loop is fitted.