Q:

Other frequencies and breaking glass

I know an individual can use the natural frequency of glass to break it, but is it possible to break glass with a frequency other than the natural frequency?  Will the glass still vibrate if the frequency around it is not its natural frequency?

A:

Reductio ad absurdum - place the glass in a beam of sound of sufficient intensity and it will shatter if it does not melt first. An ultrasonic siren is a good place to start.

