Will My Hearing Aids Generate Feedback?

If your grandparents had hearing aids, you may know what feedback is. It is the annoying high pitch sound that comes out of a hearing aid.
Basically, it is the sound signal that leaks out of the hearing aid, cycles around and is picked up again by the microphone from the hearing aid. It is the same acoustic principal as hearing that loud noise when someone on a stage has the microphone too close to the speaker. In earlier days, feedback in hearing aids was a major issue that hearing aid technology could not fix or control very well. The features within the hearing aid technology was not advanced enough to tell the hearing aid to eliminate feedback when it heard it. The styles of hearing aids that were available at the time were also not elaborate enough to cope with all degrees and shapes of hearing losses.
The good news, the styles of hearing aids that are now available and the advancements in technology are good enough that that you should not experience feedback. This said. Feedback is still an acoustic phenomenon that you can experience with hearing aids. If you do, it typically means that your hearing aids are not properly fit for you on an acoustic level, and or not programmed correctly.

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