Make a Contact Microphone : 10 Steps (with Pictures) - Instructables
Make this DIY Contact MIC Circuit - Homemade Circuit Projects
building contact microphones - john grzinich
Amazon.com: Lovermusic Piezo Transducer Microphone Pickup Jack Mic Contact Replacement for Guitar DIY : Musical Instruments
Designing and building an active contact microphone for field recording and sound design — Ezra Gray Audio - Sound Engineer & Sound Artist in Dorset, UK
Belt The Quarantine Blues Into A Homemade Mic | Hackaday
Sigil Transducer - DIY Contact Mic Kit | CCTV
Building (or Buying) Contact Mics – Zach Poff
LOM knowledge base: research:contact_mics
How to make your own Contact Mic (no solder) - YouTube