Infra-red and RF systems

Infra-red systems enable you to get round the problem and potential hazard from trailing wires.  The system comprises two parts, a transmitter and a receiver.  The transmitter part is connected to the signal source (such as a television) and the receiver part , which you need to keep near you, is connected to your hearing aid or to a set of headphones.  The signal is sent between the parts in the form of invisible infra-red light.  Sound quality can be better from infra-red systems than from induction loops, for example , but direct sunlight can cause interference and you need to maintain 'line of sight' between the transmitter and the receiver for good communication.

                                           

                                                         A typical Infra-red listening system

 

You may also come across systems that use radio frequency (RF) communication between the parts insead of infra-red, and these have the advantage of not being dependent on line of sight orientation.

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Image © RNID