What Is a Supercardioid Microphone? Pattern and Uses

A supercardioid microphone is a directional microphone that picks up sound mainly from the front and rejects more sound from the sides than a standard cardioid. The trade-off is a small area of sensitivity directly behind the capsule, called the rear lobe. Understanding that shape is what makes a supercardioid useful instead of frustrating.

How the supercardioid pattern works

Polar patterns describe how sensitive a microphone is to sound arriving from different directions. A cardioid pattern is heart-shaped, with its least sensitive point directly behind the mic. A supercardioid narrows the front pickup, so sound from the sides is reduced more, but it gains a small rear lobe. Its points of greatest rejection sit off to the rear sides rather than straight behind, and manufacturers commonly place them somewhere around 120 to 130 degrees from the front. Check the polar diagram in your microphone's documentation for the exact shape, because it varies by model and often by frequency.

In practice, a supercardioid helps when unwanted sound comes from the sides, such as a nearby keyboard, a second speaker or room reflections. It helps less if the main noise source sits directly behind the microphone, where the rear lobe can pick it up.

Common uses

• Stage vocals and speech, where floor monitors can be placed in the rejection zones to reduce feedback.

• Podcasting, streaming and voice-over in untreated rooms, where reducing side reflections and background noise makes speech clearer.

• Video calls from a shared or busy space, when you can stay consistently in front of the microphone.

• Instrument miking, such as drums, where isolating one source from its neighbours matters.

A supercardioid is less forgiving if you move around a lot, turn your head while talking, or need to capture several people around one microphone. For those cases a cardioid or omnidirectional pattern is often easier to use.

Before you start

Confirm that your microphone actually uses a supercardioid pattern. Some microphones have a single fixed pattern, while others offer a pattern switch or software setting. The specification sheet or manual is the reliable source; product names and marketing photos are not.

Check how the microphone connects. USB microphones appear directly as an input device on the computer. XLR microphones need an audio interface or mixer, and condenser models usually need phantom power from that device. Choosing the pattern and positioning the microphone are physical steps and happen locally; nothing about the pickup pattern depends on an online service. If you record through a call or streaming platform, its own audio processing and file handling are separate and should be checked in that platform's documentation.

Step-by-step instructions

• 1. Identify the front of the microphone. Side-address models are spoken into from the side marked by a logo or indicator; end-address models are spoken into from the top. The manual shows which applies.

• 2. If your microphone has selectable patterns, set it to supercardioid. Leave other settings at their defaults for now so you can compare later.

• 3. Point the front of the microphone at your mouth or the sound source and keep a consistent distance. Because the pickup is narrow, small changes in angle affect the sound more than with a cardioid.

• 4. Place noise sources, such as speakers, monitors, fans or a keyboard, toward the rear sides of the microphone rather than directly behind it.

• 5. In your operating system's sound settings, select the microphone as the input device. If you also use headphones or speakers, check that the output device is the one you expect so you can monitor what is recorded.

• 6. In your recording, streaming or call app, select the same microphone. Many apps keep their own device choice separate from the system default.

• 7. Set the input level so normal speech registers clearly without reaching the top of the meter. Adjust gain on the microphone or interface first, then fine-tune in software if needed.

• 8. If your software lets you choose a sample rate, keep it consistent between the device and the project or app to avoid conversion problems. Some USB microphones support only fixed rates, so check what the device reports.

Each of these steps is reversible: you can switch the pattern back, move the microphone or reselect a previous device at any time.

Check the output

Make a short test recording while speaking from your normal position, then repeat it while speaking slightly to one side of the microphone. On a supercardioid, the off-axis take should sound quieter and thinner. That difference confirms the pattern is working and shows how much positioning matters.

Listen for background noise in pauses between words. If a noise source is louder than expected, it may be sitting in the rear lobe; try rotating the microphone so the source falls toward the rear sides. Also listen for a boomy, bass-heavy voice, which usually means you are too close because of the proximity effect common to directional microphones.

Keep in mind that a pickup pattern reduces unwanted sound but does not remove it. Call and streaming apps may also apply their own noise suppression or level control, which can change what the other person hears compared with a local recording.

Common problems and next steps

Voice level rises and falls: the narrow pickup is sensitive to head movement. Stay centred on the microphone, use a stand or boom arm that keeps it fixed, or consider a cardioid pattern if you move a lot.

Feedback or echo from speakers: move the speakers out from directly behind the microphone and into the rejection zones toward the rear sides, lower the speaker volume, or use headphones.

Too much room sound: reduce the distance to the source, check that the microphone is actually pointed at it, and make sure the input level is not set so high that quiet room noise becomes prominent.

No sound or the wrong microphone in use: recheck the input device in both the system settings and the app, and for XLR condenser models confirm that phantom power is enabled on the interface or mixer.

Supercardioid or hypercardioid: a hypercardioid narrows the front even further and has a larger rear lobe. If side noise is still a problem and the rear is quiet, a hypercardioid may suit you; if the rear is noisy, a cardioid may be the better choice.