Induction loops, also called hearing loops, are often the most practical, cheapest and lowest maintenance solution for giving good quality access to the hearing impaired, rapidly becoming the most popular solution for the hard of hearing.
The costs of maintenance of an induction loop are extremely low, once installed they tend to last 5 years without maintenance. And not to forget – the hearing aid wearers do not need to pay for any extra receiver – the receiver is already built-in in their hearing aid! They just switch their hearing aids to T-position and enjoy the sound.
How does it work?
Most hearing aids have a built in T-coil, a small wireless receiver, in addition to the regular microphone. When current passes through a wire (the loop cable), a magnetic field is generated around it. If a coil (the telecoil in the hearing aid) is brought within this magnetic field, a corresponding current is created. In technical language, the current is induced in the second wire, hence the term ”induction loop”. This electro-magnetic principle is the basis for hearing loops and the T-coil technique was invented as far back as the 1950’s!
Step by step
The hearing loop driver is connected to the source of the sound, e.g. an audio system. The loop driver transforms the signal into an electric current in a loop cable surrounding the listening area. The loop current sets up a magnetic field which fluctuates with the audio.
When the hearing aid is switched on to the T-mode, the T-coil will pick up the signal from the magnetic field and convert it back into audible sound. The sound is clear and crisp and tailored for the individual’s hearing loss.
For more information on how an induction loop system can benefit your workplace, venue or even home, please get in touch with us!