Mics for Rooms with Echo: Cardioid vs Hypercardioid - YouTube
File:Polar pattern hypercardioid.svg - Wikipedia
performing - Microphone pick up patterns for live performance - advantages/disadvantages of cardioid, supercardioid or hypercardioid? - Music: Practice & Theory Stack Exchange
Studio Gear Chapter Two: Microphones Page 4
Hypercardioid microphone: Definition, characteristics, and uses explai – SYNCO
Audix D2 Hypercardioid Dynamic Instrument Microphone for Studio and Broadcasting
Hypercardioid Condenser | Shotgun Microphone - Mic - Aliexpress