Hearing aids

Hearing aids are designed to improve hearing. A distinction is made between two groups:

  1. Behind-the-ear (BTE) devices are worn behind the pinna. They amplify the sound in the outer ear canals. As the ear canal is open, a natural hearing sensation is created and the ear is well ventilated. In addition, there is usually an interface to telephones or FM systems. These devices are suitable for severe hearing loss.
  2. In-the-ear (ITE) devices sit completely in the pinna and in the ear canal. They are barely noticeable and pose no problem for people with glasses. They also offer good directional hearing and a natural sound. However, due to the different ear shapes, the devices have to be customized and there is a risk of ear canal blockage. These devices are suitable for mild to moderate hearing loss.

This is just a sample of the hearing aid market. A larger overview can be found in the Statuatory Health Insurance's Medical Technical Aids Register in product group 13.

Today's devices work digitally: the sound picked up by a microphone is converted into a digital signal and amplified. Finally, a loudspeaker transmits the amplified sound to the eardrum via an earmold. Hearing aids require batteries; they are rarely offered with rechargeable batteries.

Adaptations by a hearing aid acoustician play an important role in the provision of hearing aids. They carry out audiological measurements, adjust suitable devices individually to the hearing loss and offer them for testing in everyday life.

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