Assistive Listening Technology

Hearing Loops

How they work

Sound from a source such as a person speaking into a microphone or music from a sound system, is sent to an induction loop driver. The driver converts the audio into a magnetic signal, transmitted through a wire loop. This signal is picked up wirelessly by the telecoil (T-Coil) in a hearing aid or cochlear implant, which then converts it back into clear audio for the listener.

Sound is delivered directly to the ear without any delay (latency) via a hearing aid or cochlear implant.

Devices with a telecoil (T-Coil) pick up the signal from a Hearing Loop and convert it into clear audio, delivering sound directly to the user without the need for extra equipment.

T-coil users can receive sound invisibly, simply and directly to their own hearing aid or cochlear implant without the need for a separate receiver.
Simply switching the hearing aid over to its T setting will give the user access to broadcast audio signals in the looped area. Using a T-coil enabled device enables an audio signal to be picked up anywhere within a properly looped area, making it easy for people to move around and still hear clearly.
hearing aid close up

Hearing loops have their own quality and performance standard for installations.

This ensures that, regardless of the make of hearing loop, It provides clear, consistent sound throughout the looped area.
Typically, hearing loops are a fit once device, and hearing loop drivers can last many years, making them attractive to venue owners and facilities managers. This may be one of the reasons why there are so many more loops available than any other technology.

Hearing loops can be found wherever you see this Assistive Listening sign.

A hearing loop symbol should be mounted at eye level beside every entrance to a looped room, with an additional, larger sign positioned prominently on an internal wall. At reception desks or service counters, place the sign on, or immediately adjacent to, the counter in a spot that cannot be obscured by the person being served. For intercoms and help points, fix a small symbol beside the call button at a height that remains clearly visible to the user.
At reception desks or service counters, place the sign on, or immediately adjacent to, the counter in a spot that cannot be obscured by the person being served.
For intercoms and help points, fix a small symbol beside the call button at a height that remains clearly visible to the user.
Even if you cannot find any sign of a loop system, it's always a good idea to ask the venue if one is available.
assistive listening sign
How to Access a Hearing Loop
Look
Look
Look for assistive listening signs. (Find out more about signeage here)
ask
Ask
Although adequate signage should communicate a loop system is available, this isn't always the case.
switch
Switch
Switch to the ‘T’ or ‘MT’ setting on your hearing aid(s), cochlear implant or bone conduction device.
hear
Listen
Listen to clear, undelayed audio.
Hearing Loop Advantages
Low Overheads
Minimal time and capital overhead for facility providing assistance to T-coil users.
Flexible
Can be integrated into large areas such as a concert hall, theatre or cinema, or fitted to something as small as an intercom in a doorway or lift / elevator.
Standardised
Have sound quality standard (IEC60118-4) for installations.
Clear
bypasses external or background noise and other acoustic distortions.
Zero Latency
No sound delay due to end-to-end analogue transmission.
Discreet
Uses the person’s own device to connect to the audio signal without drawing attention to themselves.
Accessory Agnostic
Non T-coil users can use loop receivers with headsets.
Hearing Loop Limitations
Potential Interference
T-coils can pick up electromagnetic interference – avoidable with an IEC60118-4 compliant installation
Potentially Complex
Installation in some buildings can be complex.
Metal Issues
Metal content in building structure can cause signal loss - resolved by effective loop layout design.
Privacy
Sound privacy requires appropriate loop design

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 Hearing Loop Applications

EQUIPMENT PERFORMANCE STANDARDS

A correctly installed system is inherently compliant with IEC 60118-4

A suitable loop driver will always be compliant with IEC 62489-1

ACCESSIBILITY STANDARDS

Fully compliant per ADA Standard 219

BS 8300 Design of an accessible and inclusive built environment