This is not easy to explain, and every time I do I get looked at like I'm either an alien or talking bollocks
I have the ability to move something inside my ears that causes a hum and a vibration. The sound reminds me of the way wind sometimes sounds through the phone, and it tickles a little bit. It happens exclusively when I want it to, and I get tired after about a minute. The intensity is affected by my breathing, but it can be done while holding my breath with either full or empty lungs. After a minute or two I get tired. I learned to do this when I was trying to learn to move my ears like some people are able to
I would appreciate any clues as to the underlying mechanism of this. I always forget to ask the ear doctor to take a look when I'm at the office, since most of the time I forget I can do this