Make this DIY Contact MIC Circuit - Homemade Circuit Projects
Designing and building an active contact microphone for field recording and sound design — Ezra Gray Audio - Sound Engineer & Sound Artist in Dorset, UK
Marshmallow Contact Microphone with Preamp - YouTube
Contact Mics Contact Microphones Piezoelectronic Transducers Piezo Microphones Weirdo Gadgets Designed by Crank Sturgeon Manufactured by Huso Solutions since 2007
Collin's Lab: DIY Contact Mic - Make:
Cortado" Balanced Piezo Contact Mic kit now available from Zeppelin Design Labs | diyAudio
How to Build a Contact MIC Circuit
How to Build a DIY Contact MIC Circuit
How to Make a Contact Microphone : 4 Steps - Instructables