How a Hearing Aid Works

 How a Hearing Aid Works

In its simplest form, a hearing aid is an amplifier that makes sound louder. Today’s hearing aids do much more than that, but they wouldn’t help much if they didn’t amplify. Let’s take a look at basic elements that make amplification possible.


A microphone converts sound into an electrical digital signal.


An amplifier increases the strength of that signal.


A speaker/receiver converts the amplified signal back into sound and sends it to the inner ear. The brain “hears” and understands the sounds.


Hearing aids require power to amplify sound. An inexpensive and convenient source is a battery. Hearing aid batteries come in five sizes, which are based on the style and size of the hearing aid.


Of course, hearing aids do much more than just amplify sound. They also improve hearing in difficult situations with advanced technology features like feedback elimination and the ability to hear better on the phone. Wireless hearing aids also allow you to wirelessly connect to your favorite devices like TVs, music, phones and more.


hearing aid works



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6 Responses to How a Hearing Aid Works

  1. Jeff Curtis says:

    I was really curious as to how hearing aids worked, and I had no idea they have a microphone and amplifier. I have been told that I might need to get a hearing aid soon. Thanks for explaining to me what a hearing aid is in simpler terms.

  2. Grace Turner says:

    I didn’t know this was how hearing aids worked I thought it was completely different. I have a hard time hearing sometimes but I thought they were only for people that are deaf. I’ll try and use this to amplify the sound. Thank you for posting this article about how hearing aids work.

  3. I have always wondered how a hearing aid actually works. So it is kind of like wearing headphones!? It seems like technology is making these devices better and cooler. Thanks for the info!

  4. Judy Wilson says:

    After I found out that my hearing is impaired enough that I need to start wearing a hearing aid, I figured that I should learn more about how they work. I’ve always wondered exactly what helps to amplify sound to help people hear better. It’s interesting that they come with a little microphone and amplifier to convert sound into an electrical digital signal and increase the strength of the signal. Thanks for posting this!

  5. Thanks for explaining the basics of how hearing aids work. It is amazing that we have the technology to help people who can’t hear well. Do you know about any up and coming technology to improve current hearing aid function. Thanks for the info!

  6. Charles Kemp says:

    I think it is so cool that a little tool like a hearing aid can make such a difference to someone. I have heard that the batteries have to get replaced all the time because the aids are running all day long. I have a friend that uses them and he says that the only problem is when it gets really loud because he doesn’t know what voice is my voice trying to talk to him.

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