Source
Source: http://video.google.com/videoplay?do...7442856739526 http://www.ecolemoudon.ch/classes/neuf/verres2.pdf http://www.physics.ucla.edu/demoweb/...ith_sound.html http://www.acoustics.salford.ac.uk/a...cs_info/glass/ http://fr.wikipedia.org/wiki/R%C3%A9...r.C3.A9sonance...