Originally posted by Wezil
I suspect an internal cause.
Something along these lines (from wiki):
I suspect an internal cause.
Something along these lines (from wiki):
The tensor tympani muscle making the eardrum tremble
As of 2005, a scientific hypothesis suggests the Hum originates on the eardrums of affected individuals by the tensor tympani muscle trembling. (The tensor tympani is a muscle within the inner ear for tightening the eardrum.) The 40-page hypothesis can be read in German on the pages of the German Association for Research about the Hum, IGZAB (InteressenGemeinschaft Zur Aufklärung des Brummtonphänomens). See: http://www.IGZAB.de . See de:Brummton-Phänomen.
As of 2005, a scientific hypothesis suggests the Hum originates on the eardrums of affected individuals by the tensor tympani muscle trembling. (The tensor tympani is a muscle within the inner ear for tightening the eardrum.) The 40-page hypothesis can be read in German on the pages of the German Association for Research about the Hum, IGZAB (InteressenGemeinschaft Zur Aufklärung des Brummtonphänomens). See: http://www.IGZAB.de . See de:Brummton-Phänomen.
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