Date: Fri, 11 Oct 2002 09:28:24 -0700

Author: Ron Ebert

Subject: Re: breaking a glass with a speaker


At 08:03 AM 10/11/2002 -0800, Erik Herman wrote:

>Hello everybody, I'm new to the listserv but you might remember me from
>red-headed guy from the University of Arizona.
>Anyway, I want to show my students what they've all seen on TV--that you
>can break a glass with sound energy.
>I tried it on my own & it didn't work by just matching the pitch with a
>generator, turning it up 'till I couldn't take anymore, then fine tuning
>it in both directions.
>Where am I going wrong? glass thickness? more power? finer tuned frequency?
> 'Focusing' the sound somehow?
>As it was, I could smell my speaker beginning to burn afterwards.
>Also, has anybody ever been able to do this with just a mic, amp, & speaker
>so that it creates a feedback loop?

See We have
a 100 percent success rate.

Ron Ebert
UCR Physics Department