<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Thanks Ron—that's a very cool and informative site. I was fascinated by the page on tuning fork behavior. I'm puzzled however by his statement in the clang mode section that "the human ear does not hear frequencies below 500 HZ very well". I've always thought that we could hear down to 50 HZ or something like that. Maybe I'm something fundamental here (no pun intended).<div><br></div><div>Allen Wright<br><div><div><blockquote type="cite"><div><br><font class="Apple-style-span" color="#000000"><br></font>Date: Sat, 02 Feb 2013 13:26:02 -0600<br>From: Ron Nossaman <<a href="mailto:rnossaman@cox.net">rnossaman@cox.net</a>><br>To: <a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a><br>Subject: [pianotech] vibration stuff<br>Message-ID: <<a href="mailto:510D684A.7090706@cox.net">510D684A.7090706@cox.net</a>><br>Content-Type: text/plain; charset=ISO-8859-1; format=flowed<br><br><br><br>If anyone's interested in exploring some interesting vibration <br>fundamentals, not piano specific though some of it usefully applies, Dr <br>Dan Russell has been a good source for a long time.<br><br><br><a href="http://www.acs.psu.edu/drussell/demos.html">http://www.acs.psu.edu/drussell/demos.html</a><br><br>http://www.youtube.com/watch?v=_X72on6CSL0<br><br>http://www.youtube.com/user/drdanku<br><br>Ron N<br><br><br>------------------------------<br></div></blockquote></div><br></div></div></body></html>