<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 5.50.4134.600" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV> </DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">Yes, Richard, I have the book and I've read the article. As I have said several = time, my experience was some different. </DIV> <BLOCKQUOTE TYPE="CITE"> Del</BLOCKQUOTE> Sorry if I seem er.... eager to help..... but it seemed like = you said you had very limited experience with Wograms experiment and had little = knowledge of his work and that you based your tentative skepticism to = modal analysis on just one piano and that on the other hand you had learned = quite a bit from that one experiment about soundboards in general... all that = seemed just a little vague so I threw this out. </BLOCKQUOTE> I said I have no knowledge = (other than what he has written) of Wogram's experiment. And that, while my = knowledge of modal analysis is limited, I do have some knowledge of, and experience = with, modal analysis in general. I did learn a lot from the work I did on the = project. Yes, it was with just one piano, but it is my understanding that Wogram = was also discussing just one piano. That results of work I did differed in = important ways from those of Wogram's.   <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px"> you reply to Phil kind of matter of factly about this again when = you say...   <BLOCKQUOTE> <DIV>"I can't see any advantage to this. Other than as a teaching = aid to help understand how the soundboard works. It is only going to = illustrate at what point the soundboard resonances come in and what their = shapes are. Again, this is with an unloaded board. Everything is going = to change once the strings go on and their up to pitch."</DIV></BLOCKQUOTE></BLOCKQUOTE> <DIV dir=ltr>Please keep this in = context. This was a reference to Steinway supposedly doing this as part of a production step.</DIV> <DIV dir=ltr> </DIV> <DIV dir=ltr> </DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px"> but you seem to be saying you have too little experience with = Wograms work and modal analysis (haveing done just one yourself) to state this = position as a fact... </BLOCKQUOTE> No. I have no experience = with Wogram's work other than what he has published.     <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px"> You said....   <BLOCKQUOTE>"Well, as I've said, I have limited experience with the technique. But that was on a new grand piano I had designed and = built. So I was at least intimately familiar with the instrument and = with what the designer intended to achieve with the design. I learned more = about the design during the few days I was able to work with an engineer from = B&K on the modal analysis project than I ever expected. It gave me = insights into the functioning of the soundboard I doubt I'd have gotten any = other way."</BLOCKQUOTE> Now I dont mean to tick you off or anything Del... = </BLOCKQUOTE> It sure seems like = it.   <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px"> I am really just trying to get straight what your experience base = is on this, and why you seem to feel so strongly that Wograms standpoint on = the relationship between unloaded and loaded conditions is wrong.  </BLOCKQUOTE> Because my experience, and = the results obtained, differed substantially from those he has published.   <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px"> Couldnt you describe a bit more about this example you mention = above... what you did, how you measured both before and after and that kind of = thing. I would also be very interested in knowing what kind of things you felt = were valuable... you mention some insights into soundboard functions... = what particulars. </BLOCKQUOTE> No.   <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px"> Could any of us learn any of these same things by carrying out the = sand experiment ? </BLOCKQUOTE> Perhaps. But I'm not at = liberty to be much more specific than I've already been. Del</BODY></HTML>