Picking the right microphone polar pattern is one of the fastest ways to get a cleaner recording. I’ve watched beginners spend hours treating a room when the real fix was switching from omnidirectional to cardioid. On the flip side, I’ve also seen engineers chase “more direction” with a hypercardioid when an omni would have captured the natural room sound they actually wanted.
If you’ve ever wondered why your vocals sound distant, your drums leak, or your podcast picks up the neighbor’s dog, the polar pattern was probably working against you. In this guide, I’ll walk you through how to choose a polar pattern for what you’re recording, how to read the diagrams, and which pattern fits which real-world situation.
Table of Contents
What Is a Microphone Polar Pattern?
A microphone polar pattern (sometimes called a pickup pattern) describes how sensitive a microphone is to sound coming from different directions. Imagine standing in the middle of a circle with the mic pointed forward at 0 degrees. The polar pattern tells you how much sound the mic picks up at every angle around that circle.
The three main types of polar patterns are cardioid, omnidirectional, and figure-8 (bidirectional). Everything else – supercardioid, hypercardioid, and wide cardioid – is a variation of these three. Knowing the differences between them is what separates a muddy recording from a focused, professional one.
Why does it matter? Because your polar pattern decides what the microphone hears and what it ignores. It controls how much room noise, bleed from other instruments, and background hum make it into your recording. Choose well and you spend less time editing. Choose poorly and you’ll fight the sound the entire session.
How to Read a Polar Pattern Diagram?
Every mic spec sheet includes a polar pattern diagram. It looks like a balloon, kidney, or figure-8 drawn from above. Here’s how to read it in three quick steps:
Find the 0-degree mark. This is the front of the microphone, directly on-axis with the capsule. Most polar pattern diagrams put it at the top.
Look at the shape. The drawn area shows where the microphone is most sensitive. The further the line stretches from the center, the more sound that direction picks up.
Read the numbers on the rings. Each ring represents a dB (decibel) reduction. A “-10 dB” ring means sound from that angle is 10 dB quieter than sound at 0 degrees. The closer a ring sits to the center, the more the mic rejects that direction.
For example, a cardioid diagram shows a heart shape reaching forward to 0 dB at 0 degrees and dropping to roughly -25 dB at 180 degrees (directly behind). That tells you the back of the mic rejects sound by about 25 dB compared to the front.
Cardioid Pattern – The Go-To for Most Recording
The cardioid pattern is the most commonly used polar pattern in home and professional studios. It’s named after the heart-shaped (“cardioid”) pickup area on the diagram. The mic is most sensitive at 0 degrees, gradually less sensitive to the sides, and rejects sound almost entirely from the rear (around -25 dB at 180 degrees).
Cardioid is the safest choice for most recording applications. I keep a cardioid condenser on my desk for podcast work, voiceovers, and vocal sessions. It rejects the laptop fan behind me, the keyboard clicks to my right, and most of the room reflections bouncing off the walls.
Best uses for cardioid:
Solo vocals and voiceovers
Podcasts and streaming
Acoustic guitar (single instrument, focused capture)
Close-miking amplifiers
Home studios with untreated rooms
The trade-off is the proximity effect: when you get close to a cardioid mic, the bass response boosts. That’s flattering for some voices but muddy for others. If that’s an issue, switch to an omnidirectional pattern.
Supercardioid and Hypercardioid Patterns
Supercardioid and hypercardioid are tighter versions of cardioid. They reject more sound from the sides (about -15 dB at 125 degrees) and reach a little further toward the back, but they pick up a small rear lobe directly behind the mic.
The hypercardioid is the most directional of the standard patterns. It has the tightest front pickup of any common polar pattern, which makes it perfect for isolating one instrument in a loud mix. I reach for a hypercardioid when I’m miking a snare drum surrounded by other loud cymbals and toms – the tighter rejection helps the snare sit cleanly in the final mix.
Best uses for supercardioid and hypercardioid:
Drum overheads and individual drum mics
Live stage vocals where monitor bleed is a problem
Film and broadcast dialogue in noisy environments
Field recording when you need to isolate a distant source
The trade-off: because of that rear lobe, hypercardioids pick up more sound from behind than a regular cardioid. Aim them carefully and watch what’s directly behind the mic.
Omnidirectional Pattern – When You Want Room Sound
An omnidirectional pattern picks up sound equally from every direction. The polar pattern diagram is just a perfect circle. There’s no rejection at 180 degrees because the mic hears the back just as well as the front.
Omnis sound natural and open because they don’t have proximity effect or rear-lobe artifacts. They capture the full sense of a space, which is why I use an omni pair whenever I record a choir, a string quartet, or a room tone for a film project.
Best uses for omnidirectional:
Choirs and ensemble recordings
Room ambience and atmospheric mics
Stereo recording techniques like spaced pair or ORTF
Field recording of natural soundscapes
Interviews where you can’t control the speaker’s position
The trade-off: omnis pick up everything, including the HVAC, the refrigerator hum, and your neighbor’s TV. They’re a poor choice for untreated bedrooms or noisy locations.
Figure-8 (Bidirectional) Pattern
The figure-8 pattern (also called bidirectional) is most sensitive at 0 and 180 degrees and rejects sound from the sides (about -25 dB at 90 and 270 degrees). On a diagram, it looks like two balloons connected at the center of the mic.
Figure-8 is the classic choice for ribbon microphones and the standard pattern for mid-side (M-S) and Blumlein stereo recording techniques. I pull out my figure-8 ribbon whenever I’m recording a face-to-face interview in a quiet room – both speakers sit on opposite sides of the mic, and the sides reject any computer fans or street noise.
Best uses for figure-8:
Two-person interviews with one mic
Blumlein and mid-side stereo recording
Recording a duet facing each other
Acoustic instruments where you want side rejection but front and back capture
The trade-off: figure-8 has a strong proximity effect and needs careful placement. Anything noisy on the sides will still get rejected, but anything directly in front or behind will be picked up clearly.
Wide Cardioid and Multi-Pattern Microphones
Wide cardioid (sometimes called sub-cardioid) sits between cardioid and omnidirectional. It picks up a bit more from the sides than a regular cardioid but still rejects the rear somewhat. It gives you a slightly more open sound while keeping some rear rejection.
Multi-pattern microphones let you switch between patterns using a switch on the mic. Most offer cardioid, omnidirectional, and figure-8, sometimes with the wide and tight variants in between. If you’re not sure which pattern you’ll need for a given session, a multi-pattern mic gives you the flexibility to decide later.
I keep a multi-pattern condenser in my locker for sessions where I might need an omni for the room but a cardioid for the lead vocal. One mic, two jobs, no swapping hardware in the middle of a take.
How to Choose the Right Polar Pattern for What You’re Recording
This is the practical heart of the question. Match the pattern to your source and your environment:
Vocals (solo, lead): Cardioid. It focuses on the singer and rejects the room. This is the standard for almost every vocal session.
Vocals (choir or group): Omnidirectional pair (spaced or ORTF). You want the room and the blend of voices.
Drums: Hypercardioid or supercardioid on individual drums to fight bleed. Omnidirectional pair overheads for natural kit sound.
Podcast / voiceover: Cardioid. The go-to for a single host in an untreated room.
Interviews: Omnidirectional if both speakers can sit anywhere, figure-8 if they sit facing each other.
Acoustic guitar: Cardioid for a focused, intimate sound. Try omni if the room sounds great and you want air around the instrument.
Electric guitar amplifier: Cardioid or supercardioid, placed close to the speaker cone.
Field recording: Supercardioid for isolating distant sources, omni for natural ambience.
Start with cardioid for almost anything. If the room sounds too dry or the voice sounds too bass-heavy, try omni. If you need more isolation from a loud source, switch to supercardioid or hypercardioid.
The 3:1 Rule for Microphone Placement
When you’re recording more than one source at once – two singers, two acoustic guitars, or even a singer and an instrument – the 3:1 rule keeps bleed under control.
The rule says that the distance between two microphones should be at least three times the distance from each microphone to its source. So if your singer is 6 inches from the mic, the second mic needs to be at least 18 inches away from the first one.
Why does this work? When the second mic sits at least three times the source distance away, the unwanted sound it picks up from the first source is at least 9 dB quieter than the desired source. That keeps phase cancellation (the hollow, comb-filtered sound you get when two mics pick up the same source) mostly out of the recording.
I use the 3:1 rule whenever I’m recording an acoustic duo. Singer 1 sits 8 inches from her mic, so I place the second mic for the guitar at least 24 inches away. The result is two clean, separable tracks.
Proximity Effect and Lavalier Patterns
Proximity effect is the bass boost you get when a directional microphone is placed close to the source. It’s strongest in figure-8, strong in cardioid, and nonexistent in omnidirectional. Singers sometimes use it intentionally to add warmth and presence to a voice. Other times it muddies the recording.
If you’re getting too much bass on a vocal, either back away from the mic or switch to an omnidirectional pattern. Most condenser vocal mics have a high-pass filter switch that also helps.
For body mics (also called lavaliers), the usual polar pattern is omnidirectional. Lavaliers sit on the chest where the speaker’s head movements would make a directional mic lose signal whenever they turn their head. Omni lavaliers pick up a consistent level regardless of head position, which is why they’re standard for theater, broadcast, and public speaking. They also have minimal proximity effect, so chest placement doesn’t boom out the bass.
Frequently Asked Questions
What is the best polar pattern for recording?
Cardioid is the best polar pattern for most solo recording applications. It picks up sound clearly from the front, rejects the back by about 25 dB, and reduces bleed from other sources. Use omnidirectional for choirs or room ambience, figure-8 for face-to-face interviews and Blumlein stereo, and supercardioid or hypercardioid for isolating loud sources like drums.
What is the 3:1 rule for mics?
The 3:1 rule states that when using two microphones on different sources, the distance between the mics should be at least three times the distance from each mic to its source. For example, if a mic is 6 inches from a singer’s mouth, the second mic should sit at least 18 inches from the first mic. This keeps unwanted bleed at least 9 dB quieter than the intended source and reduces phase cancellation.
What is the usual polar pattern for a body mic?
Lavalier and headset body mics almost always use an omnidirectional polar pattern. Omni lavaliers pick up sound equally from all directions, so they maintain a consistent level even when the speaker turns their head. They also have no proximity effect, which prevents chest-placement bass buildup. The trade-off is that they pick up room noise, so quiet locations are important.
What are the three main types of polar patterns?
The three main types of microphone polar patterns are cardioid, omnidirectional, and figure-8 (bidirectional). Cardioid is most sensitive at the front and rejects the rear. Omnidirectional picks up sound equally from every direction. Figure-8 picks up equally from the front and back while rejecting the sides. Other patterns like supercardioid, hypercardioid, and wide cardioid are variations of these three.
Final Thoughts
Learning how to choose a polar pattern for what you’re recording is one of the highest-leverage skills in audio. Start with cardioid for most solo work, switch to omni when you want room sound or a natural feel, and reach for supercardioid or hypercardioid when you need serious isolation. Apply the 3:1 rule whenever more than one mic is open, and you’ll get cleaner tracks with far less editing.
The best polar pattern is always the one that matches your source and your environment. Try each pattern on your next session and listen carefully – your ears will quickly tell you which one fits.