Subject: Re: Ultrasonic Hearing (via bone conduction!) From: Matt Marble <hamletist(at)hotmail.com> Date: Sun, 27 Nov 2005 11:51:51 -0800<html><div style='background-color:'><DIV class=RTE> <P><BR>I believe the slowly-becoming-public sound technology, hypersonic sound, makes use of ultrasonic sound to transmit frequencies via bone conduction. This allows sound to be directed as a lasar. Very interesting. in any case it will some day be all around us (battery racks, soda machines, cars, mcdonalds, ad infinitum) </P> <P><A href="http://www.ideas21.co.uk/248">http://www.ideas21.co.uk/248</A></P></DIV></div></html>