Indeed, because the cracked pieces of panel are all glued to the ribs and the ribs are vibrating with the panel. No? Terry Farrell ----- Original Message ----- > Clearly ribs do participate in the transmission of energy across the grain > of the panel. Even when a soundboard is cracked all the way across the > panel in several places the entire panel still moves. > > David Love > davidlovepianos@comcast.net > > -----Original Message----- > Grin.... Well I am not going to get sucked into that debate agin.... I > remember well 3 years or so back. I'll just restate my own unschooled > perspective that it seems to me that all vibrational energy passing > through the panel, over the surface, across the ribs, or wherever are > all an intregral part of what ends up being the longitudinal wave > passing through the air that hits our ears. As for how a soundboard is > not a speaker... I'm afraid thats beyond my knowledge to tell. Seems > like a lot of good analogies are possible comparing the two for sure... > but just how far that goes is another question. > > I would say however... that the fact that the air gets moving because of > the transverse motion doesnt mean that internal vibrations caused by the > same input, dispersed by the same system are not interconnected... > interdependant. > > But this is all off on a completely different tangent... and... well go > there if ya'lls wants to. > > hehe > Cheers > RicB > > > Terry writes: > > And this is the heart of my question. Do sound waves travel through = > soundboard wood (in any meaningful way) or does the soundboard assembly = > act primarily as a diaphragm whose vibration is caused by the vibrating = > bridge, which in turn is caused by the vibrating string. That is the way = > I've always pictured it. And hence my "circle of sound" comments. > > I know a soundboard is not a speaker - but how different is it? A stereo = > speaker does not rely on soundwave transmission through the cone = > material - but rather it is simply driven by the coil and magnet and = > electic current. Is not the soundboard simply driven in a similar way by = > the strings/bridges?
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