What are the alternatives?

There are some instances where induction loop systems are not the ideal choice. There are a number of alternatives which may be considered should this be the case.

There are 2 main alternatives to induction loop systems, each of which has its own advantages and disadvantages. 

Infra-red systems 



Infra-red systems transmit the signal via infra-red light which is invisible to the human eye. These are commonly used where induction loop systems are not able to provide a satisfactory level of performance. Whilst induction loop system can be severely affected by metal content infra-red systems have no such limitation. Induction loop systems may also have to compete with 'ambient' magnetic signals in the room which can cause a loop to be unusable due to high levels of background hum. Another significant advantage of the infra red system is confidentiality. Because the signal travels by light it will not be overheard outside the room in which it is being used. The main disadvantage is that anybody wishing to use the facility must have a specialist receiver which the operator of the venue will provide. Care must be taken that these are returned after use or it can be a costly operation! 



RF systems 


Radio Frequency systems are the second alternative. These have the advatage of being small and easily portable and can be supplied on multiple frequencies so a number of systems can operate within a room. the main disadvatage is the same as the infra-red system in that a special receiver is required for them to operate.