Ampetronic Ear Symbol

How do hearing loops work?

Home // Info Centre // Introduction to hearing loops // How do hearing loops work?

What are hearing loops?

A hearing loop, sometimes referred to as an induction loop, T-Loop or an audio frequency induction loop (AFIL), is an assistive listening system that provides access to facilities for those who experience hearing loss and use a hearing aid. It takes a sound source and transfers it directly to a hearing aid without background noise, interference or acoustic distortion.

Click below to download a copy of our guides, which feature a simple explanation of how hearing loop systems work and answers to the most commonly asked questions.

All about hearing loops/induction loops guide PDF

All about counter loops guide PDF

How do hearing loops work?

An induction or hearing loop system transmits an audio signal directly into a hearing aid via a magnetic field. This greatly reduces background noise, competing sounds, reverberation and other acoustic distortions that reduce clarity of sound.

This diagram below illustrates how hearing loops work.

  1. A sound source, such as a voice, cinema or audio system, is captured using a microphone or line out connection.
  2. The sound signal is connected to an Audio Induction Loop driver. The driver generates a current which delivers the signal to a loop made from copper tape or wire.
  3. The copper wire hearing loop typically surrounds the area where the listening audience is located and produces a magnetic field.
  4. The magnetic field produced is picked up by a Telecoil (or T-coil) inside a hearing aid.
  5. A hearing aid tailors the sound to the specific needs of the individual. It delivers sound directly into the ear canal, without background noise and with the full spectrum of sound frequencies needed to make it intelligible.

The number of people that can fit in the ‘looped’ area at the same time is the only limitation.
Hearing aid wearers don’t suffer the inconvenience of asking for and wearing a headset that marks them out as hard of hearing; and expensive receivers are not required.
Although Hearing Loops are an inherently simple technology, care should be taken in their design, specification and installation. Ampetronic can support you in developing a loop system that conforms to the International Standard and is of optimum benefit to the end user.

What different types of induction loop are there?

Selecting a loop solution, that will adequately meet the needs of a hearing aid user, can be easily determined by asking just a few simple questions:

What type of hearing solution is required?

An area coverage loop, for use in a hall, theatre, meeting room or similar


a service point loop solution, for use with a retail counter or reception desk?

Area coverage hearing loops, as the name suggests, cover an area in which multiple people can access the loop signal simultaneously.
The type of area loop system chosen will depend on:

  • the dimensions of the area to be covered
  • the construction of the floor
  • any issues of adjacency or privacy
Room dimensionsFloor constructionAdjacency and privacyRecommended solutionRecommended loop drivers
Less than 4m across shortest dimensionorfloor has no metal in structureandno requirementAmpetronic Perimeter loopC5-1
CLS series
Greater than 4m across shortest dimensionandfloor has metal in structureand/orrisk of overspillAmpetronic MultiLoop™C5-2


For service points and intercoms:
Dealing with background noise when faced with a busy reception desk, ticket office or audiovisual interactive display can be a challenge for a person with hearing loss. Distance from a
receptionist can also cause frustration.

For service points and help desks, a preformed loop and microphone combined with Ampetronic CLD1 service point amplifiers provide a person with hearing loss clear, intelligible sound direct to their hearing aid.

Ampetronic TalkPerfect offers effective communication through physical barriers, supporting privacy and security in a robust and easy to use system.

Service point and speech transfer
Service PointsCLD1CLD1-AC
Speech Transfer SystemTalkPerfect
Door intercomsHLS-2C Active loop panel


How can hearing loops help?

Hearing loops can be beneficial in a very wide range of environments, from large venues such as theatres and conference facilities, to teaching spaces, meeting rooms and one-to-one communications such as ticket counters and reception desks. They are the only effective solution to assist hearing aid users in transport environments, in vehicles, terminals and stations.

  • Transport systems
    Airports, stations and transport networks, elevators, help points, car park access points
  • Vehicles
    Taxis and private cars, minibuses, coaches, trains, trams and boats
  • Venues
    Theatres, cinemas and concert halls, stadia and sports venues, places of worship, conference and lecture halls
  • Point-of-Service
    Counters, intercoms and entry-phones, drive-throughs, help points
  • Work
    Meeting rooms, video conference facilities, desks and offices
  • Home
    TV rooms, phones, individual car systems
  • Education
    Lecture halls, classrooms
  • Safety
    Public address systems, voice alarm systems, help points

How much do hearing loops cost?

The cost of a Hearing Loop system is proportional to the size and complexity of the loop design, the associated amplifier(s) and the accessories required.

A ‘fit-for-purpose’ retail/reception desk or home TV room loop should typically be less than £300 plus any installation fees, whereas a professional system for a large venue may cost thousands of pounds proportional to the size of the venue and other audio visual equipment that may be installed.

It is worth remembering that the cost of installing a Hearing Loop in a medium size venue, such as a place of worship, will often be less than the cost a single user has paid for their professionally fitted hearing aids.

For more information contact our friendly and knowledgeable team on +44 (0) 1636 610062 or email sales@ampetronic.com.

Our products

Explore all ampetronic products

Latest news

Explore all latest news

Case studies

Explore 110 case studies