The right microphone depends on the room, not just the voice

• How it works: an electrically charged diaphragm requiring phantom power. Far more sensitive to quiet detail.

• What it picks up: everything — the voice, the room, the air conditioning, and the traffic outside if the window is single-glazed.

• Suits the room: treated rooms and booths, where the extra detail is a benefit rather than a liability.

• Sound character: detailed, open and airy. Rewards good technique and punishes bad rooms.

• Typical use: voiceover, solo narration, music, and anything recorded in a properly treated space.

02 — Directionality

What polar pattern actually controls

The pattern decides which directions the microphone listens to — which is how you exclude a room you can't fix.

Cardioid is the studio default: sensitive in front, rejecting behind. It's why the wall behind the microphone matters acoustically, and why a cardioid mic pointed away from a noisy window solves half the problem for free.

Supercardioid narrows the front pickup further but reintroduces a small rear lobe — better isolation between two people at the same table, at the cost of needing more precise placement.

Omnidirectional hears equally in all directions. It sounds the most natural and is the least forgiving of an untreated room, so it belongs in booths or in roundtable situations where the room is genuinely good.

Figure-of-eight hears front and back and rejects the sides — the classic two-people-facing-each-other-across-one-mic setup, and useful for rejecting a specific noise source that sits to one side.

03 — Distance

Placement and proximity effect

Distance from the microphone changes both how much room you hear and how the voice itself sounds.

Every doubling of distance brings in dramatically more room and less voice. A microphone at 15cm in an untreated room can sound fine; the same microphone at 60cm in the same room sounds hollow and distant.

Proximity effect is the bass boost that occurs as a directional microphone gets close to the source. Used deliberately it gives the warm, intimate broadcast voice; used accidentally it produces boomy, muddy speech that has to be corrected later.

A working starting point for speech is a hand's width from the mouth, slightly off-axis so plosives pass over the capsule rather than into it. Off-axis placement does most of what a pop filter does, without anything in the frame.

In video, placement fights framing. A boom just out of frame, a well-hidden lavalier, or an unapologetically visible broadcast arm are the three honest answers — a microphone placed for the camera rather than the voice is the usual cause of bad studio audio.

04 — Connection

USB vs XLR

A workflow decision more than a quality one — but it sets a ceiling on what the room can grow into.

USB microphones have their converter built in and connect straight to a computer. For a single presenter with no plans to expand, a good USB mic is a genuinely sound choice and removes an entire piece of hardware.

The limit arrives with the second microphone. Running two USB mics into one computer is awkward at best, and the moment a studio needs multi-person recording, the architecture has to change.

XLR separates the microphone from the converter, so the interface or mixer handles the preamps, phantom power and routing. It scales to as many inputs as the hardware has, and each part can be replaced independently.

For any room intended to host more than one person, or to last past its first workflow, XLR into an interface is the right foundation — and it's the only route to per-person multi-track recording.