How to Make a Contact Microphone : 4 Steps - Instructables
building contact microphones - john grzinich
Piezo contact microphone hi-Z amplifier – low noise version – Richard Mudhar
Belt The Quarantine Blues Into A Homemade Mic | Hackaday
Building (or Buying) Contact Mics – Zach Poff
DIY Contact Mic Tutorial – Deferlow
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:
Make a Contact Microphone : 10 Steps (with Pictures) - Instructables
Cortado" Balanced Piezo Contact Mic kit now available from Zeppelin Design Labs | diyAudio