mounting homebrew contact mic

SYSph@ntOPus wils0450 at tc.umn.edu
Wed Sep 8 18:04:58 CEST 1999


Hey hey, this is the kind of thing they did for the original blasters in
"Star Wars". they whacked the golden gate bridge a few times on the cable
and treated it with some reverb and flange (I think). I forget exactly,
but I believe that this was for both the vehicle and personnel type
blasters, with the only big defference being parameters and EQ. 

There, I finally got to use it in conversation !

On Wed, 8 Sep 1999, harry bissell wrote:

> Yes... airrifle pellet... very light (as pellets go) and has a flat nose so it
> is easy to glue reliably...
> 
> The piezo as a driver will probably not have enough "balls" to drive a spring,
> esp at low frequencies... I'd use a iron spring (or iron rod... pipe etc) ir for
> a small spring, a ferrite bead... and drive with an electromagnet driven from a
> stereo amp... Get enough turns so you don't fry it...
> 
> Slinkies make good springs... if you put a magnetic pickup on a few stretched
> slinkies, and then KICK it it makes a wonderful explosion...  "Yes" (the band)
> shared that idea during a soundcheck during the "Relayer" tour... used in "The
> Gates of Delirium"... Its like kicking a spring reverb but much BIGGER !!!
> 
> Christian Oncken wrote:
> 
> > All this talk about contact mics got me thinking... would it be possible to
> > create a strange reverb/delay system using 2 contact mics?  These things are
> > transducers, capable of making noise as well, no?  If so, use one as a
> > "driver" and the other as a "pickup", with appropriate circuitry to drive
> > the input signal and amplify the result.  With this arrangement you could
> > connect them both to opposite ends of a suspended spring, send a signal to
> > be effected to the driver, receive it at the pickup and have the equivalent
> > of a spring reverb, right?  How about sticking them to the pipes in your
> > house, or to a huge concrete floor?  Could you turn anything into a reverb
> > this way?  It would work better on some things than others I suppose... how
> > about a tree, or an antenna tower?
> >
> > Sorry if this is a little bit out there... its late and I'm tired, but am I
> > crazy?  What do you all think?  I thinking miking a tree would be cool.
> >
> > Christian Oncken.
> >
> > BTW,  what exactly is a wadcutter pellet?  Some kind of air rifle
> > projectile?  Please elaborate in private email.
> >
> > >Thanks to Harry Bissell & his idea (gluing a .177 wadcutter pellet to a
> > >RadShack piezo--#273-064, $1.79), I now have a piezo contact mic.  But I
> > >don't plan to attach this unit to a big metal/nylon disk for use as a drum
> > >trigger. I wish to use some kind of non-destructive removeable reusable
> > >adhesive to place the face of the piezo/pellet gadget securely in contact
> > >with, say, the soundboard of guitar or for other such temporary
> > >installations.  Any suggestions/sources for such an adhesive or other means
> > >of temp. attachment?
> > >
> > >Thanks for your help,
> > >Kevin
> > >
> 
> 





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