5 Core Premium Vocal Dynamic Cardioid Handheld Microphone Unidirectional Mic with 12ft Detachable XLR Cable to ¼ inch Audio Jack and On/Off Switch for Karaoke Singing (Black) (308P) - Walmart.com
Digital Audio for Public Historians (3): Microphone Types — Jason M. Kelly
The Shure SM58® is a unidirectional (cardioid) dynamic vocal microphone designed for professional vocal use in live performance, sound reinforcement, and. - ppt download
Unidirectional vs. Omnidirectional Microphones - What's the difference? – Arkartech