Blow on a empty pop can sounds like Crystal Glass?

Question

I can blow on a empty Pop Can and make a tune, it sounds like Crystal glass when you make it sing. I'm just wondering how and why it does that? Any one know how to do that and know why it does that? I bet i'm not going to get that much answers, Well don't know in tell i do it. blowing on a empty Pop Can and sounds like Crystal glass, Any one know why it does that, No one? Okay thanks any way.

Answer 1

I question whether the sound is all that similar, but the reasons are clear and rather easy. A crystal glass is set "singing" because the thin glass is vibrating and the open cylinder is tuned by the depth of the water in the bottom.
In a metal can, the air is set vibrating by the breath forming an oscillation (pressure building inside, then escaping) like on a flute or piccolo. The length of the open space inside sets the frequency.