Sony Xperia Miro ST23i Microphone PCB Board - ETrade Supply
GoPro USB-C Mic Adapter Teardown & Info
Amazon.com: SM-F900U USB Charger Flex Cable Replacement for Samsung Galaxy Fold,USB Type-C 3.1(with Mic Flex Cable+Waterproof Rubber Ring) : Industrial & Scientific
How to Waterproof Circuit Boards (epoxy Method). : 7 Steps - Instructables
Helping Hands Soldering, Big Size Magnetic Third hand Station with 4 Soldering Magnetic Arms and Waterproof Steel Weighted Base for Electronics PCB Crafts Repair (N-4AR-RD2) - - Amazon.com
AN-1124
Low Noise, High Sensitivity, Long-distance Mic Electret Condenser Microphone Microphone Amplifier Circuit Board - Tool Parts - AliExpress
100 - 150 dB microphone - 377B02 - PCB PIEZOTRONICS SA - 20+ mV/Pa / for the aerospace industry
Jrwaro Wireless Earbuds, Bluethooth 5.3 Headphones HiFi Stereo in-Ear Earphones with Touch Control and Type-C Charging Case, Built-in Microphone IPX6 Waterproof Ear Buds for Sport and Work - Yahoo Shopping
A small PCB that uses two TL082BCP op amps to amplify a signal from a contact microphone. - Share Project - PCBWay
How to waterproof your electronics and products
Building A Top-Notch Electret Microphone | Hackaday