[sdiy] oscillating a plate

[Czech Martin]

What about recording just the impulse response?
A contact microphone (sp?) on some sheet of
metal and a little hammer or metal rod should do the trick....

If you have the impulse response you  can do convolution,
no need for maintainace, space, divorce.

I remember that we once used contact microphones on a
metal stair case, the sound was then transformed
and played in the hall....


m.c.

-----Original Message-----
From: Byron G. Jacquot [mailto:thescum at surfree.com]
Sent: Mittwoch, 2. April 2003 06:20
To: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] oscillating a plate


>is a steal plate about 12Kg and i make a construktion like a guilotine, 
>the plate is fixed in one point (in the upper side).
>i don't tried to make it oscillate with the power of the sound but with 
>the resonant frequency, i tried to find the selfoscillating frequency of 
>the material....
>You give me different ideeas so i have now to experiment with it...

If you're trying to make a plate reverb, check out this article:
http://www.prosoundweb.com/recording/tapeop/plate/plate.php
It has some pointers about suspending the plate, and  how to attach a
transducer.

If you're looking for a more pure tone, you might find better luck with
lightweight strips or bars of metal.  I have trouble imagining how I'd
excite a 12Kg mass with just sound, at reasonable volumes.  Could you tap it
with a solenoid hammer?

Byron Jacquot