Also known as a hearing loop or T-loop, a counter induction loop aids those with hearing problems in work or other public situations. A counter induction loop operates by taking a sound source and delivering it to a hearing aid without the interference of background noise. A portable system allows the loop to be used in a range of locations and is ideal for person-to-person situations, such as banks, post offices, small meeting rooms, reception desks, open plan offices and ticket booths.