I have had my ears checked with x-rays and ultrasound many times because of the constant infuriating noise in my head.<p>I have perfect hearing and no head trauma.<p>I always though that Tinnitus was a high pitched ringing sound but the audiologist explained that tinnitus sounds are very varied.<p>The noise I experience is like the low whirring of a central heating system always on in the background sometimes with a regular beating sound very like the low bass in a song.<p>Over time I noticed that it was the clenching of my jaw, especially when under stress or worrying about stuff, that was the main cause of the sounds.<p>Laying in bed at night I can now stop the noises by relaxing my jaw with my mouth open while I am trying to fall to sleep.