Hearing aids would be highly benificial ti improve their quality of life. Modern aids are very simple to use and manage. The newer rechargable aids will take the hassle of changing batteries..which is a great plus. Your hearing aid provider will have some demonstration models or some places will even offer a trial aids as loan. That will be a good starting point. Once your grandparents get a hang of using it and see the benefit I'm sure they'll love the experience... As a professional I find family support and encouragement plays a big role in rehabilitation outcome.
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