Subject: ultrasonic hearing via bone conduction From: "Maher, Rob" <rmaher(at)ECE.MONTANA.EDU> Date: Wed, 23 Nov 2005 15:21:24 -0700I recently received a query from a colleague about bone-conducted ultrasonic hearing in humans. I also found a prior thread from a couple years ago about ultrasonic perception here in the AUDITORY list. Based on the published literature it seems clear that humans can get a hearing sensation from ultrasonic vibrations coupled to bone. Anyone able to share their experience working with this phenomenon? Any commercial hearing aids in this realm? It is also interesting that some audio equipment manufacturers are starting to spec their loudspeakers into the ultrasonic range based on these findings. Thank you, Rob Maher * * * A few relevant references are: Lenhardt, Skellett, Wang, and Clarke, A.M., "Human ultrasonic speech perception," Science 253 (1991) 82-85 And more recently: "Where'd you get those ultrasonic peepers?" http://www.acoustics.org/press/150th/Lenhardt.html Fujimoto, Nakagawa, and Tonoike, "Nonlinear explanation for bone-conducted ultrasonic hearing," Hearing Research 204 (2005) 210-215 http://www.h6.dion.ne.jp/~fff/documents/pdf/heares.pdf