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Fairbank Harding are Induction Loop specialists

The Induction Loop Principle

The history of the Induction Loop in this country begins effectively in 1974 when the NHS made available a new range of hearing aids - the type worn behind the ear.

However hearing aid users soon found that if they simply turned their device up in an attempt to improve intelligibility it also resulted in an increase in nearby coughs and rustles - sometimes to painful levels. Many users would then give up at this point, turn their hearing aids off and try to use what limited natural hearing they have.

When the hearing aid is used in conjunction with an induction loop system the user experiences clear audio with out any amplified background noise.

Most modern day hearing aids have a switch to select between 'M' (Microphone) and 'T' (Telecoil).

The 'T' position was originally provided for use with a telephone handset. The speaker coil inside a telephone's earpiece radiates a small electro-magnetic field which varies in line with the sound in the earpiece. When in the 'T' position, the telecoil inside a hearing aid picks up this field and amplifies it, producing a much clearer sound for the user.

An induction loop system works in exactly the same way as a telephone handset. The induction loop cable is placed around the perimeter of the area to be covered.The size of the loop required varies depending on the application, ranging from 1 square meter for ticket booths or bank counters to 600 square meters for churches, theatres or cinemas, etc.



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