Anybody out there familiar with the physics of acoustics? My dad (who has an undergraduate degree in physics) suspects that the lower lid may give rise to some out-of-phase cancellation in certain directions. I'll try to look further into this with some other physicists I know .... ZR! RPT Ann Arbor MI diskladame@provide.net ---------- > From: Delwin D Fandrich <pianobuilders@olynet.com> > To: pianotech@ptg.org > Subject: Re: The Revenaugh Lower Lid in New York Times > Date: Tuesday, December 09, 1997 2:02 AM > > > > Benjamin Treuhaft wrote: > > > Today's NYT has a front-page story on a new invention: a lower lid > > which collects and reflects outward the tone from the bottom of the > > soundboard - tone which normally just bounces around down there. The > > only part of the idea I don't like is that with the lower lid in place > > there is no room for me. I love to sit under pianos when they're being > > played. You have to pretend you are checking the substructure or the > > customer will think you're nuts. > > Benjamin Treuhaft > > Berkeley, Calif. > > ----------------------------- > > I looked up the story in the NYT and found it to be quite interesting. Especially the part that said Mr Revenaugh held the > patent on the device. > > Odd. I'm sure I've came across an old patent on this idea before. As in, from several decades back. Anyone living near a > library housing the proper reference works up to doing a quick patent search? > > Personally, I'm not sure just how effective the device would be in a concert hall. I should think that if you were standing > close to the instrument on the treble side you might notice some difference. Back ten rows, I kind of doubt you'd hear much, > if any, change, let alone any improvement. > > I should think, however, that this might be somewhat like positioning the instrument, or deciding on voicing: shouldn't it > kind of be up to the musicians? The pianist and the conductor. Even, perhaps, the piano manufacturer. Surely it's not a > decision for the "artistic director" alone to make. > > Del. > >
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