My grandfather is 87 years old , recently( past 1 month ) he has become very weak as his food intake has reduced to great extent and he doesn't feel like eating .. He doesn't have any health issues as such like (diabetes , bp etc ) . But few days back he was having problem in pissing so he was put on catheter and now he Voice has become too low we hardly can hear him unless we come too close. We tried many home remedies but his voice is not coming back though he is able to perfectly hear and see things . Please suggest as he eagerly wants his voice to return back to normal.