Ron, Much of what I've presented toward this conversation is theoretical. But I beg to differ with you about the lack of evidence to support the difference in energy transfer through the different glued mediums. There is a difference, but whether it plays a role in the sound of a piano could be debated to ad nauseam. Take a piece of pinblock stock about 12" in length, cut absolutely square in the other directions and then hit it with a hammer along the edge of the glue lines and then on the flat laminate. There is a difference is pitch. The laminate side produces a lower tone with the edge glued side a higher tone. Roger Gable ----- Original Message ----- From: "Ron Nossaman" <rnossaman at cox.net> To: <pianotech at ptg.org> Sent: Tuesday, September 21, 2010 10:43 AM Subject: Re: [pianotech] YC Capo Bars > On 9/21/2010 5:10 AM, William Truitt wrote: >> I have heard the glue line argument from others against the use of >> horizontally laminated bridge caps because of the barrier of the glue >> line. >> I'm not equipped with the knowledge or scientific tools to advance the >> argument on either side. But I would follow up what Del said where in >> testing they couldn't hear the difference between the three kinds of caps >> by >> saying that - if the glue lines do indeed interrupt or distort the >> movement >> of the vibratory energy, such changes to the patterns of movement are >> insignificantly small at best and inaudible (if we are to believe Del and >> Baldwin's testing). > > Despite all the strident noise made about glue lines blocking some > mysterious energy vibrations in bridges, no one with the measuring tools > that have become available in the last 200 years has found this to be the > case and published their results. At least that I know of. It remains one > of the many near universal faith based "facts" that "everyone knows", and > will remain so in spite of what Baldwin's R&D department or anyone else > has found. It's just intuitive and obvious, right? > > Thomas Kuhn once noted that people tend to not be convinced by evidence. > Instead, outmoded ways of thinking die with those who hold them. That's > not entirely true, unfortunately. Outmoded ways of thinking are passed > down from generation to generation in the avoidance of understanding and > the comfort of belief. It's always baffled me that so much energy is spent > in defending these things. > > Ron N >
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