Infrared, FM and Audio Over WiFi
In some venues, hearing loops cannot be used, and alternative technologies have been installed.
In most cases, Auracast is now the preferred solution, but you may still find these systems in places you visit.
Infrared
Infrared (IR) systems use a transmitter to send an audio signal as non-visible light.
IR systems are often used in theatres and cinemas.
A special receiver is required to pick up the IR signal. The venue will usually lend you a receiver for your visit.
You may get a choice of a receiver with headphones or a neckloop, depending on how you want to listen.
Unlike hearing loops, infrared signals are not affected by metal or other interference. This means that the signal stays strong and reliable.
Infrared light does not travel through walls or around corners. This makes IR systems good when privacy is important, but also means that transmitters must be in a place where the signal will not be obstructed.
FM
An FM system or radio aid uses a frequency modulated signal to transmit the sound from a microphone to a receiver.
You can attach an FM receiver to hearing aids or cochlear implants, or use an FM receiver device with headphones.
An FM system allows you to move around within a certain range. They are most often used in classrooms or in workplaces where you need to move around a lot.
Audio over WiFi
Audio over WiFi uses a WiFi connection to transmit sound from a microphone or sound system to an app on your smartphone or tablet.
To hear the audio, you connect your hearing device to your smartphone or tablet using whatever technology you normally would. For example, Bluetooth, a neckloop or headphones.
The benefit of Audio over WiFi is that you can use your own mobile device to access the audio. However, WiFi networks often add too much delay to the signal, which can result in a worse listening experience.