How hearing aids work
Hearing aids are a combination of tiny components including a microphone, amplifier and speaker. Depending on the device, they also offer a range of sophisticated features. All instruments have:
- Microphones that pick up sound
- An amplifier that makes sound louder
- A tiny chip that processes and improves the quality of sound
- A speaker (receiver) that sends amplified sound to the ear
- A battery that runs the sound processors
Hearing aids work by amplifying sounds the ears can no longer detect and transmitting the improved signal to the hearing nerve, which in turn transmits the message to the hearing region in the brain.
At first, some people find the sounds seem unnatural but this is because they haven’t been heard for some time. Gradually the brain adjusts and these ‘new’ sounds seem natural again.