<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><blockquote type="cite"><br><table cellspacing="0" cellpadding="0" border="0" style="position: static; z-index: auto; "><tbody><tr><td valign="top" style="font: inherit; "><div>...vibrations from the strings and board will travel around the case and come back into the board at another point, affecting tone....</div></td></tr></tbody></table></blockquote><div><br></div></div><div>I'm having trouble visualizing this. Can you please provide a good vector diagram of this? Thanks.</div><div><br></div><div>Terry Farrell</div><br><div><div>On Aug 12, 2012, at 6:50 AM, Euphonious Thumpe wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><table cellspacing="0" cellpadding="0" border="0" style="position: static; z-index: auto; "><tbody><tr><td valign="top" style="font: inherit;"><div>Another way to discern the relative vibration conduction of various case materials would be to simply touch a tuning fork to some part of the cases distant from their soundboards, and compare results. Many of us have experienced an annoying, loud buzz coming from a piano that is dicovered to be originating from a loose hinge pin or desk screw; so, again, it is reasonable to assume that vibrations from the strings and board will travel around the case and come back into the board at another point, affecting tone in some way. And that the type and density of the core material will have an effect on this transmission. But whether that effect is positive or negative to tone is completely subjective, and none of us are (I presume) replacing 100 year old Mason cases with MDF during rebuilds, so the matter is not particularly germane to this list, and I'll not mention it further. <br>(Other than to say that I personally prefer the tone of a top-notch, classic piano with a very hard wood core.)<br><br>Thumpe</div></td></tr></tbody></table></blockquote></div></body></html>