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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 thatcan
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 BBCprogramme
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
billb@eskimo.com http://amasci.com
EE/programmer/sci-exhibits science projects, tesla, weird science
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