Assistive Listening Technology

Infrared

How it works

Sound, like someone talking into a microphone or music coming from a sound system, is sent to an infrared transmitter. This transmitter turns the sound into a signal and beams it out as invisible infrared light, filling the room. Anyone wearing a compatible receiver, like a headset or neckloop, can pick up the signal and hear the sound clearly.

Sound is delivered from the receiver to the ear via a headset or to the hearing aid / cochlear T-coil coupler via a personal inductive neck loop.

Infra-red (IR) assistive-listening systems deliver clear speech intelligibility in theatres, conference rooms, and training spaces by transmitting audio directly to headsets or hearing-aid receivers.

The focused IR signal minimises ambient noise and bypasses electrical interference. This can be an advantage when induction loops are impractical or privacy is a factor.
Infrared receivers can either be used with headphones or a neck-loop to connect to a hearing aid / cochlear implant via telecoil (T-Coil).
infrared in a museum
How to Access an Infrared System
Look
Look
Look for assistive listening signs. (Find out more about signeage here)
ask
Ask
Ask the venue staff for a receiver.
switch
Switch
If using a neck loop be sure to switch to the 'T' or 'MT' setting on the hearing aid(s), cochlear implant or bone conduction device.
hear
Listen
Listen to clear audio.
Infrared Advantages
Simple
Relatively simple installation (avoids the requirement for installation of a loop cable around the perimeter of the room).
Universal access
Infrared systems remain accessible to users without hearing aids or cochlear implants; they can simply connect their own headphones to the receiver.
Private
Sound signal does not transmit through walls (provides privacy).
Performant
Good alternative in terms of audio performance where hearing loops are not available.
Multi-channel
Multi-channel audio available.
Latency
Low latency.
Infrared Limitations
Needs Multiple Receivers
Receivers required for all users (approximately 1 for every 25 seats).
Batteries Required
Receivers require battery replacement or recharging after use.
Line of Sight
May require "line of sight" between transmitter and receiver.
Sunlight Issues
Infrared technology is susceptible to strong sunlight, thus not suitable for venues with a high level of glass or glossy surfaces in sunlight.
Location
Not suited for outdoor or walk up / walk through locations.

What is a Telecoil?

A telecoil (or "T-coil") is a small copper wire loop embedded in many hearing aids and cochlear implants. It functions as an electromagnetic receiver, designed to detect signals from an assistive listening system.

When enabled, the telecoil bypasses the device’s microphone and directly converts the magnetic field generated by the loop into audio signals. This allows for clearer, more focused sound by minimizing ambient noise and enhancing speech transmitted through microphones or public address systems.

Simple to use
A telecoil lets you connect directly to hearing loops in public venues and at home with no extra equipment needed. Simply switch your hearing aid or implant to T-mode to tap into clear, direct sound.
Often Overlooked
Many hearing-aid and implant users are never informed that a telecoil exists. Unaware of it, they miss out on any benefits a Telecoil can provide.
Telecoil FAQs

Frequently
Asked
Questions
About
Telecoils

What is a telecoil?

A telecoil (or “T-coil”) is a tiny copper loop built into many hearing aids and all cochlear implants. When you switch to the “T” program, the device stops using its microphone and instead receives the magnetic signal broadcast by an assistive-listening system—most often a hearing loop, FM/RF, or infrared feed—and converts that signal directly into clear, high-fidelity audio.

How do I activate a Telecoil?

Switch your hearing aid to the T program when you’re in a looped area. This turns off the microphone and lets your aid pick up the loop’s magnetic signal for clearer sound. Switch back to normal to hear as usual.

If you need to hear both loop audio and ambient sound, e.g., conversation with someone beside you—choose the “MT” or “Mic+T” program if your aid offers it.

Why should a hearing aid include a telecoil?

A telecoil effectively doubles the versatility of your hearing device. It gives you instant, cable-free access to loop-equipped theatres, transport hubs, houses of worship, council chambers, museum tours, and even in-home TV loops. The result is markedly clearer speech with minimal background noise and no extra hardware to carry.

Isn’t Bluetooth sufficient?

Bluetooth is ideal for short-range links to a phone or tablet, but it is not the global standard for large-area assistive listening and often requires brand-specific accessories. A telecoil is universal: walk into any looped venue, flip to “T,” and you are connected.

How can I confirm whether my current aids have an active telecoil?

Check with your audiologist or your user manual. Many models highlight the feature with a “T” in the product name (e.g., miniRITE T) or list “telecoil” in the specifications, but the program may still need to be enabled in the clinic.

What should I specify when purchasing new aids?

Ask for access-ready instruments that include a Built-in telecoil. Ideally, a single button or app should let you switch between microphone, telecoil, and Auracast modes without neck-loops or dongles.

Using a Telecoil
How to use your Telecoil
1. Check your device
Confirm your hearing aid or cochlear implant has a built-in telecoil.
It’s often listed as “T” or “MT” in the manual or settings.
2. Find the "T" switch
Look for a physical switch, button, or app setting to toggle T-mode. Some devices switch automatically when near a loop.
3. Test It Out
Your telecoil will pick up sound in venues with hearing loops, or when using a neckloop provided by IR or FM systems. No extra equipment needed on your end.

Common Infrared Applications

EQUIPMENT PERFORMANCE STANDARDS

Neck loop must provide a signal compliant with IEC 60118-4 when measured as specified in IEC 62489-1

ACCESSIBILITY STANDARDS

Compliant if receivers provided as defined by ADA Table 2193