Lavalier wireless choices are great for ... Though it could be easy to mistake cardioid mics as a separate type of microphone, cardioid, omnidirectional, and bi-directional actually describe ...

Also called a "unidirectional" mic, the term cardioid comes from "kardia," which means heart in Greek. The cardioid mic pattern loosely resembles the shape of a heart. "Bidirectional" mics pick up ...