Similar to the singing saw. You can take an old-fashioned, manually operated crosscut saw (or ripsaw, I suppose)and make it "sing" with a mallet or violin bow. BUT the saw must be bent into an "S" shaped curve. A flat saw won't sing, and a single bend won't sing. What the physics are here, I do not know. But I'll bet it’s the same phenomenon JG is describing. Alan R. Barnard Salem, MO -----Original Message----- From: Joseph Garrett [mailto:joegarrett@earthlink.net] Sent: Monday, February 02, 2004 3:08 PM To: pianotech@ptg.org Subject: Sigh!!!! Andre' Oorebeek said/asked: "OK, In our work shop we have this tuning fork mounted on a mini soundboard. If you just strike the tuning fork with 'something' you will hear it vibrate, but actually not very much. If however you put the mini sound board under pressure by bending it with your muscle power, the tone increases and becomes noticeably louder. In other words : if you apply pressure on the soundboard by bending it, the tuning fork vibrations get louder. Why? friendly greetings from André Oorebeek Please refer to my previous post. In two words: Latent Energy Joe Garrett, RPT, (Oregon) Captain, Tool Police Squares Are I --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.572 / Virus Database: 362 - Release Date: 1/27/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.572 / Virus Database: 362 - Release Date: 1/27/2004
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