Mic with focused pickup pattern — captures sound primarily from front, rejects side and rear noise. Essential for on-set dialogue recording without ambient contamination.
On set, you need a microphone that captures exactly what you want—and ignores everything else. The directional microphone does precisely that. Its capsule is designed to preferentially pick up sound waves from the front, while significantly attenuating ambient noise from the sides and rear. This is achieved through the physical geometry of the microphone's opening and internal phase chamber designs that cancel out sound from specific angles.
In practice, this looks like this: you point the directional microphone at the actor's mouth. The dialogue comes in clean—with full presence and clarity. At the same time, this type of microphone massively filters out the rumble of the camera dolly, the hum of the air conditioning, and traffic from next door. It's not perfect—no directional microphone works with infinite selectivity—but it reduces post-production work by worlds. You save hours of isolation and filtering in the edit because your sound on set is already cleaner. That's the core advantage.
The standard directional microphones on set are condenser models with a cardioid pattern or supercardioid pattern (also called shotgun). The cardioid pattern is the most universal—it tolerates slight deviations in positioning. The supercardioid pattern is even more pronounced in side rejection but requires more precise placement and can create flutter echoes if sound comes from diagonally behind. You mount the microphone on a boom pole, holding it just out of frame—20–40 cm above or beside the actor's head. The sound mixer maneuvers it parallel to the movement, following the dialogue.
Important: A directional microphone is not a magic wand. It needs wind protection (foam or fur), otherwise even light wind will cause massive noise. It also requires professional handling—vibrations are transmitted directly. Therefore, use a shock mount, never touch it directly. And the directional characteristic only works well at close range; the further away the speaker, the less differentiated the recording becomes. That's the reality—nobody works at a distance of 5 meters with a directional microphone.
In the edit—whether it's dubbing or dialogue editing—you are usually already working with clean takes because the directional microphone has done its job. This saves you filtering and artificial noise reduction, which always come at a cost.