Rijke tube

Rijke's tube turns heat into sound, by creating a self-amplifying standing wave. It is an entertaining phenomenon in acoustics and is an excellent example of resonance.

from: http://en.wikipedia.org/wiki/Rijke_tube

The gauze is optimally placed one quarter of the length from the bottom of the tube. The ones I've made are also of 50 mm diameter glass, with about 3 mm spaced brass wire gauze. I've made quite a few of these and have kept a set which is tuned to a major triad plus the octave. They are deafening!

from: http://lists.nau.edu/cgi-bin/wa?A2=ind9712&L=phys-l&F=&S=&P=24071


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