A Question On The Quality Of USB Microphones.Moving-Coil Dynamic Microphone Transducers.If that short answer was not enough, fret not! This article will go into detail about USB microphones to explain the technology behind how these easy-to-use microphones work (and how to use them). Analog audio signals are then amplified and converted into digital signals within the USB mic’s built-in audio interface and outputted via a USB connection. How do USB microphones work? USB microphones, as transducers, work the same as any other mic by converting sound (mechanical wave energy) into audio (electrical energy). For this reason, many people opt for these inexpensive plug-and-play mics. USB microphones are a popular alternative to typical XLR microphones due to their ease of use and relatively low price points.