Building A Top-Notch Electret Microphone | Hackaday
Amazon.com: uxcell 8Pcs Cylindrical Electret Condenser Microphone Pickup 85dB Through Hole Mini Electret Condenser Mic with 2 Pins 10x7mm for PCB : Musical Instruments
Electret microphone - Wikipedia
3M Peltor Electret Telescopic Boom Microphone for Comtac – Comm Gear Supply
MG-44, MG-44.1 - Electret microphone with gooseneck - HOLMCO - Holmberg GmbH & Co. KG