Shatter A Wine Glass With Your Voice

Description:  You can shatter a wine glass with your voice but it isn't easy. The pitch must match the natural frequency of the glass and the volume must be high enough t0 physically vibrate the glass. The video below documents how long it takes Mike Boyd to achieve this task.  Most students understand that vibrating materials create sound but they don't realize that the opposite is true as well.

CAUTION: When the glass breaks tiny shards of glass can enter your eye and so eye protection should always been warn when attempting this phenomenon.

Web Resource:  Fact or Fiction?: An Opera Singer's Piercing Voice Can Shatter Glass - Scientific American