🚀 go-pugleaf

In article <cWBKC9y00UgyMGo0U3@andrew.cmu.edu> rg2c+@andrew.cmu.edu (Robert Nelson Gasch) writes:
>
>I recently saw an add in my friends guitar player or guitar world issue. The 
>add was under the name Gibson so I'd say that the E-Bow is still produced. I 
>examined one of those thing a while a go and it seems that they operate on the 
>basis of an electromagnetic field which causes the string to vibrate. You 
>should not have any problems finding it if you go through the last 2 issues of 
>giutar player and /or guitar world.
>	Rob

OK, I understand that it has to be based upon some electromagnetic field in
order to work at all.  What I am looking for is what exactly that magnetic
field is doing.  Is this thing JUST a battery powered electromagnet? Or is
it, as I suspect, an oscillator hooked up to the current going through the
electromagnet?  What frequency(ies) of oscillation might we be talking about?
I have made this effect by holding a small speaker with the output of the
guitar coming out of it up to the pickups.  This is easy, the guitar will
feed back and resonate on it's own peaks and the frequencies to which the
strings are tuned/fretted.  How does this thing induce resonance without
being dependent on the output or knowing how your guitar is tuned or what
note you are about to play?  Does it resonate on some peak common to all
guitars of any shape/composition? White noise? Pink Noise?

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