Hearing Aids Sound Tinny? This Could Be Why. If your hearing aids have a "tinny" sound quality, there are several reasons why. Assuming your hearing aids are programmed accurately, and that has been verified using real ear measurement, it's possible that the tinny sound quality has to do with your brain's processing of the sound. If you've had an untreated hearing loss for any period of time, it takes at least 30 days for your auditory cortex in your brain to "re-learn" how to hear those sounds naturally with hearing aids.

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