Wednesday, September 18, 2013

Resonance on A Plate

This is one of my favorite demonstrations of resonance in an "enclosed space." The space is, of course, the plate. The lines are formed where the plate is NOT moving, so the salt/sand is moved away from the moving portions of the plate to the stationary locations. As the frequency changes and the associate wavelengths change (determined by the mass and elasticity of the plate material), the patterns move toward the next resonance. Since this is a 2D "room," the more complicated modal patterns in a 3D room are not present, but there is plenty of complexity in 2D for us to enjoy.

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Wirebender Audio Rants

Over the dozen years I taught audio engineering at Musictech College and McNally Smith College of Music, I accumulated a lot of material that might be useful to all sorts of budding audio techs and musicians. This site will include comments and questions about professional audio standards, practices, and equipment. I will add occasional product reviews with as many objective and irrational opinions as possible.