my father has had hearing loss for over two decades now, slowly starting in his early forties. it's so bad now in his early 60s that it's almost impossible to h

my father has had hearing loss for over two decades now, slowly starting in his early forties. it's so bad now in his early 60s that it's almost impossible to have a conversation with him. he's also been laid off of his tech job a couple of years ago and has retreated into isolation with his dogs. my mother thankfully still exists in his life but his cognitive decline is so noticeable it's extremely sad. he misunderstands everything, and english as a second language has made his life in the USA that much more difficult. it's quite insane the difference between him now and him even 10 years ago when he had a job and somewhat of a community. he's bought some hearing aids but it doesn't help that he's a cheap person and spent a grand total of ~90$ on them from some random store (amazon?) so suffice to say they do almost nothing aside from make high pitched sounds. I've told him to go to the doctor to buy something a bit more advanced, really look into it, but he won't and i think his decision making is part of the cognitive decline. he simply doesn't seem to care anymore. if it were up to me i would buy him some really amazing ones, but he won't even go to the doctor to seek help to diagnose what type of hearing loss he has so it'd be a waste of money. i've had this theory that his hearing loss is isolating him so much that it's affecting his ability to think, so i am not surprised at all by this study