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Re: Sound bug

Yow, Bill! That sounds like it could knock a few teeth out. No heavy metal
music on that one, for sure!

----------
From: William Beaty
Reply To: phys-l@lists.nau.edu: Forum for Physics Educators
Sent: Wednesday, March 20, 2002 10:03 AM
To: PHYS-L@lists.nau.edu
Subject: Re: Sound bug

On Tue, 19 Mar 2002, James Braunsdorf wrote:

reference to a new product called Sound Bug that is a small device that
can
be attached to hard surfaces to use the wall or tabletop as a speaker.
It
was on a BBC page and they said it would be demonstrated on a BBC
programme
on Wednesday.

I remember seeing these devices in Edmund Scientific when I was still a
kid. How is this one different?

Try gluing a supermagnet to a sound board. Then drive a small coil with
a music signal, and when you wave the coil near the magnet, guess what
happens?

Then try biting the supermagnet between your molars, and wave the coil
near your face.


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William J. Beaty SCIENCE HOBBYIST website
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