Die Induktionsspule im Hörgerät

What is the induction coil in the hearing aid?

A cochlear implant (CI) or even a normal hearing aid means an enormous help for a person with a hearing problem. In a difficult situation, these technical achievements enable a better understanding of speech. This makes it easier for the affected person to continue to actively participate in life. There are CIs and fully digital hearing aids that are equipped with many different modern functions. With these functions, it is possible to filter out disturbing sounds in everyday listening situations. The result is a more pleasant listening experience.

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However, there can always be difficulties in understanding in public spaces, for example, when a venue is sounded over a public address system. Here, too, there is now a good solution if the hearing aid contains a so-called induction coil or T-coil. The sound transmission then has less background noise and less reverberation. On the subject of induction coil you can find detailed information here.

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The importance of an inductive hearing system

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Music or speech signals can be transmitted by means of an inductive hearing system. The transmission is wireless, directly to the hearing aid or the corresponding cochlear implant, by generating an electromagnetic field through a so-called ring loop in the inductive hearing system. The electromagnetic field is then received by the T-coil in the CI or hearing aid and translated into the appropriate sounds for the listener.

Most modern sound reinforcement systems contain such an inductive system. You can find it, for example, in the following devices:

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  • Loudspeakers
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  • Amplifier
  • Mixer
  • Microphones

In a mixing console, the speech or music signal is processed and transmitted to an amplifier via inductive loop. In the inductive hearing system, however, the signal is now not transferred to a loudspeaker, but to a connected loop cable that is laid around the room. The cable then supplies the room with the sound signals.

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All persons who are within this ring loop area can then receive the sound signals via the T-coil in the respective hearing aid or CI. Rooms equipped with induction loops are marked with corresponding symbols. The German Hearing Impaired Association offers on its homepage a good overview of rooms with inductive hearing systems in your area.

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The use of the T-coil

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Very many hearing aids or cochlear implants already have a built-in T-coil. It can be activated either with the program selection button or with a toggle switch. Now you hear speech or music signals exactly as they were picked up and recorded by the microphone. If you can't understand the signal, you should ask one of our hearing care professionals to check it.

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How to participate in social life again

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Speech transmission using the T-coil works wirelessly. This transmission technology is the only multi-vendor technology and is used for both cochlear implants and hearing aids. It enables people with hearing loss to participate in social life in public spaces. The tiny coil takes up very little space in the hearing aid, so even the small in-the-ear hearing aids can be equipped with it.

Wherever inductive hearing aids are installed, you can overcome communication barriers with your integrated T-coil. Do you like going to the movies or the theater or attending concerts? Thanks to your hearing aid equipped with the T-coil, you can fully perceive such events acoustically again. Likewise, you then have at the airport, in the train or in the supermarket or in the theater no more problems, because such hearing systems are also installed there.

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Acoustically problematic situations include, for example, long distances to the output signal, loud background noise or poor room acoustics. If an inductive hearing system is installed, you no longer have these problems. Therefore, it makes sense if you ask before attending an event, whether there is an inductive hearing system and whether it is switched on.

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Questions and answers about the inductive hearing system

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Are there any interfering factors that make it impossible to receive signals from the inductive listening system on the hearing aid?

How well hearing works in a room with an inductive hearing system depends directly on how you use and set up this technology.

Is it true that both Scandinavian countries and the United Kingdom have more inductive systems than Germany?

Yes, that's true, because the world's best-known manufacturers of amplifiers are based in the UK and Sweden, for example. There is a huge market for such devices there. In Germany, on the other hand, we don't have a single producer. Moreover, Scandinavia and Great Britain are already more advanced in dealing with physical limitations. Here, Germany is still lagging behind somewhat in terms of development. However, there is now a revised standard for barrier-free construction, which specifies how public buildings are to be equipped barrier-free.

How can I respond if a venue does not have an inductive hearing system?

For the sound transmission are available in addition to the inductive hearing system a total of two other options. There is still transmission by infrared or by radio. Typically, headphones are used in this case. If you have a mild hearing loss, you can remove the hearing aid and put on the headphones instead. However, if you suffer from moderate to severe hearing loss, induction neck loops are an option. Ideally you use your own, but sometimes the organizers offer such neck ring loops.

What is the level of awareness about inductive hearing systems and hearing loss among the general public?

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People who are not hearing impaired themselves often have little ability to put themselves in the shoes of people with hearing loss. A very common assumption is that good speaker systems would already alleviate a large part of the hearing problems. This is of course not the case. Interested outsiders can get a pretty good impression of the problems that hearing impaired people often face by listening to hearing examples. These listening examples then simulate hearing impressions in various difficult situations.