Can The human Voice Really Shatter Glass? [Videos]

"A voice that can shatter glass." Is this a wive's tale or is it legitimate? Ella Fitzgerald was one of the most acclaimed vocalists in history, and was reputed to have a voice that literally could shatter glass. Back in the 1070's Memorex signed Ella to do an advertising campaign for a new innovation in recording tape.The slogan was "Is it live, or is it Memorex?" An amplified recording of her voice was used to shatter a wine glass. Vocal coach Jaime Vendera says the human voice actually can shatter glass without electronic enhancement...

Here's Ella's 1974 commercial...