Hearing aid users outside the room can overhear conversations if their hearing aids are switched to 'T'. Adjoining rooms and rooms directly above and below one another are also affected by overspill. You may want to bear this in mind if you are thinking of using your induction loop for confidential meetings or fitting more than one loop. An induction loop may cause interference in other parts of a sound system. This often occurs if the loop cable runs close to other audio cables.
Microphone cables are especially vulnerable to such interference.
Routing cables carefully often avoids this problem. The loop may produce a weaker inductive signal than expected if there is substantial metalwork in the area of the loop, and the signal strength may vary from seat to seat in the listening area. An induction loop specialist may be able to predict this and suggest solutions, but installation is likely to involve trial and error. British Standard Code of Practice Loop systems in public buildings should be installed to the British Standard Code of Practice for Audio Frequency Induction Loop Systems BS 7594. If you quote this code of practice in all specifications and contracts, it should help to ensure that your induction loop system is designed and installed to professional standards, works properly, is safe, and meets regulations.