The shouty box for Hecktate's vocalist and good friend Jon is my first attempt to create a microphone from scratch.
The contact mic is attached to a metal plate which is in turn connected to the resonant chamber and base with springs. This is in order to help pick up the vibrations and transfer them to the contact mic better.
You can check Hecktate out here: http://www.myspace.com/hecktate1
Will hopefully get some video of it in action soon!