Nothing in my house can get rid of the rumbling deep vibrating hum I have in my left ear, except that is 2 things. One is my air conditioner on its very loudest setting, but now during the winter it won't work as it s colder already than the unit will work under, and I also don't fancy being freezing. The second item that works is my central heating boiler, but I have to be stood right by it for it to mask the noise. I need louder the better, my fan on 3rd power setting is not loud enough, so I am stuck. I have tried multiple items together. Any ideas ?