While experimenting, I accidentally discovered that a Radio Shack audio transformer (1K Ohm primary / 8 Ohm secondary) (http://www.radioshack.com/product/index.jsp?productId=2103254) magnetically attached to a rare earth magnet makes for an interesting contact microphone.
I presume this is because the coil is microphonic. This did not work with several Japanese audio transformers I had of the same specifications.
In initial testing I found that the mic sounds particularly good when the magnet is attached to a larger piece of metal and objects are placed on this larger piece of metal and struck/excited.
This brings me to my question:
is there a way to use such a setup (audio transformer+magnet, attached to piece of larger metal, on which various small objects are mounted) while effectively grounding the mic and minimizing noise/interference?
I presume this is because the coil is microphonic. This did not work with several Japanese audio transformers I had of the same specifications.
In initial testing I found that the mic sounds particularly good when the magnet is attached to a larger piece of metal and objects are placed on this larger piece of metal and struck/excited.
This brings me to my question:
is there a way to use such a setup (audio transformer+magnet, attached to piece of larger metal, on which various small objects are mounted) while effectively grounding the mic and minimizing noise/interference?