No experience: Any sudden change like that would be an emergency, such as a stroke or infection of the brain inner ear. Since dementia is just a general term which could include multi-infarct dementia due to multple strokes, one of them could affect the hearing areas. Also if the person lost speech, which is common in a stroke, you might not easily know if they lost hearing or just the ability to respond.
Answered 5/7/2016
5.9k views
Sudden changes: Suggest stroke, which can be related to a vascular dementia.
Answered 5/7/2016
5.9k views
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