Door mirrors might deter some from leaving a room. Some older people are confused by mirrors, because they picture themselves as much younger than the person staring back at them. Some think the image is a ghost and others see someone to keep them company. If the person asks the same question repeatedly, write down the answer and put it in an appropriate spot. This might help lower the anxiety level for both of you.
Music is good, but keep it down.
It should be simple, so that it s not overwhelming. Perhaps leave the TV on and put out a snack before going to bed yourself. While adapting your house for the person with dementia, don t forget yourself. It s important to create a respite zone, a place where you can take a break while someone else looks after your loved one for at least a little while.