Maybe a “Mythbusters” of sorts, If you let Adam and Jamie blow up the piano at the end, they might do an episode. Wim -----Original Message----- From: Jim Busby <jim_busby at byu.edu> To: caut <caut at ptg.org> Sent: Fri, Jun 18, 2010 10:10 am Subject: Re: [CAUT] Anechoic chamber - experiments Thanks Don. All. Since I am such a neophyte at this I’ll have to rely on you and others for information like this (below). And as an aside, Don, you should know that we have 276 Yamahas, and 29 Disklaviers, so that’s why Yamaha is helping us. IOW, no offense was intended to Kawai, or anyone else. Especially you. I’ll pass this on, find out what it means <G>, and keep it in my files. There’s a lot of preliminary work to do. One thing that I’d like to “prove/disprove” are some notions as to what makes tonal changes and what does not. For instance, in a Yamaha class they would change one thing, say rep lever height, then say “Do you hear the difference?!?” Most nodded their heads in agreement, then turned to their neighbor and said “I didn’t hear a thing, did you?” What does make a tonal difference? Does needling at 3:00 and 9:00 really make for more volume (louder)? What does a heavy hammer vs. lighter hammer do to the tone? (Add clip weights) The options really are limitless, but we need to determine what is really most valuable info to us as technicians. I feel lucky to be in this position, and thanks to Ron Nossaman I question every notion that I’ve been taught as “fact”, so right now about anything is fair game. I know Kawai has their own anechoic chamber and the results are proprietary, and I’m sure BYUs studies will be intellectual property of BYU, but I’m hoping this can be a “big deal” for all of us. Maybe a “Mythbusters” of sorts, and a validation of some methods we already use. Best, Jim Jim, You've probably already planned this, but just in case. Try to arrange to make high quality recordings of each test to correlate with the spectrum data, and keep everything labeled so that you can later play back the sound that goes with the data. Also, if they can output the data as a "waterfall" type display, it makes for very interesting study. How the partials fade, and how the energy shifts back and forth between the partials as the tone decays, really affects the quality of the tone. And needling can make big changes! Don Mannino -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20100618/d4fadf7a/attachment.htm>
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