I also get the Fog Horn. Sometimes it gets so loud that i cannot hear from my left ear. I acquired this when i got Trigeminal Neuralgia due to years of extreme high blood pressure. Due to blood vessels pounding on nerves coming from the brain stem it wears off the mylin covering the nerves and causes all kinds of strange sensations,sounds, and pain.. nerves can heal if the under lying cause is found and taken care of.