I'm hearing impaired myself and for awhile I would hear things and then lose the sound. It would cause me to daydream a lot because of my own boredom. What I do know is based on my own experience with my family who has hallucinations? Have you check with your primary doctor for diabetes it your sugar is too high or too low it can cause hallucinations? I have a niece who has sleep apnea and I seen her experience hallucinate as well as other health problems. Have you have a physical done recently just to make sure that it not something physical? What about contacting a mental health professional and explain that you been hearing things and you want make sure that is not something mental? When was the last time you had your hearing tested because that can be a sign that your losing your hearing. At least for me. These are just suggestion and you don't have to do anything that make you feel uncomfortable.