Microphones
This chapter contains info on different types of microphones and their characteristics, DIY build projects and other info.
Types of microphones
The links below are useful resources for contact mic information and general field recording information.
https://www.musicofsound.co.nz/blog/the-first-rule-of-contact-mic-club
https://zachpoff.com/resources/choosing-a-contact-mic-for-field-recording/
DIY
Pre-amplification and impedance