Personal amplifiers are used when you are in situations where you need to hear.
Hearing aids are great when in a one to one conversation in quiet, but if there is any distance involved, like even just across a desk, they do not do the job. If there is surrounding noise, the hearing aid struggles to identify the noise that is masking the conversation and then suppresses what it has determined to be noise. Unfortunately, some of that suppression also subtracts speech sounds and the user misses out on essential content required for understanding.
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