This video posted on the blog “The Ramblings of SomeAudioGuy” sums up the different types of microphones used in professional recording studios, and some of the applications of these mics. No, USB is not a type of microphone, it is a way that some mics are connected to computers. If you are interested in learning more about microphones, this video will give you just the right amount of working knowledge.

USB is NOT a Type of Microphone: A Guide for Podcasting and Home Recording
at The Ramblings of Some Audio Guy