Subject: loud sounds From: Amanda Lauer <alauer(at)PSYC.UMD.EDU> Date: Fri, 12 Nov 2004 08:53:13 -0500People with hair cell loss sometimes have LOWER loudness discomfort levels than normal (hyperacusis). Even in those who don't have hyperacusis, high level sounds are usually perceived to be of "normal" loudness. ------------------------------ Date: Thu, 11 Nov 2004 18:38:16 -0500 From: "Didier Depireux, PhD" <ddepi001(at)UMARYLAND.EDU> Subject: Re: painfully loud sound I don't remember what it feels like to feel a "painfully loud" sound (whether it is felt inside the head, or just in the ear in general), but wouldn't the tympanic membrane itself be a good candidate for the pain sensation? The tympanum is innervated by four of the cranial nerves, providing general sensation through trigeminal, facial and vagal cranial nerves on the outside surface and glossopharyngeal nerve for the inside surface. I guess this might be partially answered if I knew whether people who lose their hair cells still perceive loud sounds as being painful right after hair cell loss, even though they might not perceive the sound as being that loud? Didier __ Didier A Depireux ddepi001(at)umaryland.edu didier(at)isr.umd.edu 20 Penn Str - S218E http://neurobiology.umaryland.edu/depireux.htm Anatomy and Neurobiology Phone: 410-706-1272 (lab) University of Maryland -1273 (off) Baltimore MD 21201 USA Fax: 1-410-706-2512 ------------------------------ End of AUDITORY Digest - 10 Nov 2004 to 11 Nov 2004 (#2004-237) *************************************************************** Amanda Lauer Dept. of Psychology Center for the Comparative & Evolutionary Biology of Hearing University of Maryland College Park, MD 20783 301-405-5940