There are two main differences between these two patterns: their directional sensitivity and ambient noise sensitivity. A cardioid microphone is a great option for recording in noisy environments. It picks up sound in a heart-shaped pattern, effectively reducing ambient noise from the sides and back. Conversely, a super-cardioid microphone is more directional than a cardioid microphone. This one is useful for isolating the sound source while reducing ambient noise from the sides and rear.