How do you stop your mic from picking up background noise?

You unmute to answer a question and, before your first word lands, someone on the call says "is that a vacuum?" It is the dishwasher in the next room. You did not hear it, because your brain filtered it out an hour ago. The microphone did not, because a microphone has no idea which sound in the room is the one that matters.

That is the whole problem in one sentence. A mic records pressure changes. Your voice is one of them, the fridge is another, the keyboard under your hands is a third, and the neighbor's drill is a fourth. Stopping the mic from picking up background noise is never about making the noise disappear. It is about making your voice so much bigger than everything else in the signal that the rest falls below what the listener notices, or below what a filter can safely cut.

If you are trying to work out how to reduce background noise on your mic, go in the order that costs least and helps most: position, direction, gain, then a noise gate, then software noise suppression in the app you actually use for calls. If you already know your setup is fine and you only want to compare noise removal apps, the comparison of noise cancelling software that works on calls is the page for you. If the complaint is not noise but that you sound thin, boxy or distant, making your mic sound better without buying a new one covers that instead.

First, name the noise you are fighting

"Background noise" covers at least five different sounds, and each has its own fix. Applying a noise suppressor to a ground hum, or a noise gate to a TV in the next room, wastes an evening.

The fourth row matters more than it looks. Google's own documentation for Meet says its noise cancellation removes non-speech noises and that voices from a TV or people talking will not be cancelled (Google Meet Help). Of Zoom's four suppression levels, High is the one Zoom describes as aimed at background speech (Zoom Support). A roommate on the phone behind you is exactly the kind of noise most filters are built to leave alone, because to a filter it looks like you.

Why your mic is picking up background noise in the first place

The mic does not care about loudness in isolation. What the listener hears is the ratio between your voice and the room. Engineers call it signal to noise, and every fix in this article moves that ratio.

Here is the lever most people ignore. Sound from a point source drops by about 6 dB each time the distance doubles, and Shure's recording guide puts the same rule the other way round: halve the distance between mouth and mic and the direct sound goes up 6 dB (Shure, HyperPhysics). The fridge across the room does not get closer when you lean in. Your voice does.

Run the numbers on a typical laptop setup:

Laptop mic, you at 60 cm      baseline
Mic at 30 cm                  voice +6 dB, room unchanged
Mic at 15 cm                  voice +12 dB, room unchanged
Lower input gain by 12 dB     voice back to the old level,
                              room noise now 12 dB quieter

That last line is the trick. You do not want a louder recording, you want the same voice level with everything else pushed down. Moving closer and then turning the input volume down gets you there with zero software, zero latency and zero risk of chopped words.

The opposite move is the classic mistake: the voice seems quiet, so the input slider goes to the top. The mic now hears the fan, the street and your keyboard at the same boosted level as your voice, and the ratio has not improved at all. On a Mac the slider lives in System Settings > Sound > Input (Apple Support). If it sits near maximum and people still complain about noise, the slider is part of the problem.

Step 1: get the mic close, and keep it there

For a USB or headset mic, a hand's width from your mouth (roughly 10 to 15 cm, or 4 to 6 inches) is a sane starting point for calls. Closer than that and plosives start to pop; much farther and you are back to recording the room.

The built-in mic in a MacBook is the hard case, because you cannot move it without moving the laptop, and the laptop sits where your hands and keyboard are. Two things still help:

• Raise the laptop on a stand or a stack of books so the mic is nearer your mouth and farther from the desk surface that carries typing thumps.
• Use an external keyboard so the mic is not sitting a few inches from every keystroke.

A clip-on lavalier or a headset boom solves distance permanently, since the mic travels with your head. If you are deciding whether that purchase is worth it, the article on whether a noise cancelling microphone is worth it for calls walks through what changes and what does not.

Step 2: point the dead side of the mic at the noise

Directional mics hear less from some angles. A cardioid mic is least sensitive directly behind it, at 180 degrees; a supercardioid is least sensitive at 125 degrees and a hypercardioid at 110 degrees (Shure). That null is a free noise filter you aim by hand.

Practical version: work out where the loudest noise comes from (the window, the PC tower, the door to the kitchen) and turn the back of the mic toward it. For a cardioid, put the mic between you and the noise, so the noise reaches it from the back. For a super or hypercardioid, the quiet spots sit off to the rear sides rather than straight back, so a noise source directly behind it is not in the deepest null.

Two traps:

• Multi-pattern USB mics left on omni or stereo. Omni hears every direction equally by design. If your mic has a pattern switch, cardioid is the setting for one person talking. On a multi-pattern mic such as the Blue Yeti, the pattern switch is the first thing to check; why the Blue Yeti picks up so much background noise goes through that one model.
• Side-address versus end-address. Some mics are spoken into from the side of the body, some from the end. Talk into the wrong face and you are pointing the null at your own mouth.

Step 3: a noise gate for your mic, and what it cannot do

A noise gate is a mute switch with ears. When the level drops below a threshold, it closes and sends silence; when you speak above the threshold, it opens. OBS documents its gate in exactly those terms: set a close threshold above the noise and an open threshold slightly below your voice (OBS Knowledge Base).

The OBS defaults are a useful reference even if you never open OBS:

How to set it in practice: stay silent and watch the meter. If the room sits around -45 dB, a close threshold of about -40 dB keeps the gate shut during pauses. Then speak normally; if your quietest syllables reach -20 dB, an open threshold around -26 dB lets them through. The gap between the two thresholds stops the gate fluttering open and shut on borderline sounds.

Now the limit, which matters most for calls. A gate does nothing while you are talking. When it is open, the fan, the traffic and the TV come through at full level under your voice. What a gate removes is the noise between your sentences. On a stream that matters, because hiss is easiest to hear in the silences. On a work call it can backfire: set too high, it eats the first consonant of a sentence and the soft tail of the last word, and you sound clipped.

Discord's Voice Activity mode is a gate by another name. Discord's help centre warns that automatic input sensitivity can misbehave with background noise and suggests disabling it if the ends of your sentences get cut off (Discord Support). Push to Talk avoids the problem entirely, at the cost of a key held down.

For full OBS numbers by mic type and room, the right noise gate settings in OBS goes deeper than this section.

Step 4: suppress background noise during calls with the app you already use

Noise suppression is a different tool from a gate. Instead of muting the gaps, it tries to separate voice from noise while you speak and keep only the voice. It works continuously, so it can thin out a fan under a sentence, something a gate cannot. The cost: it is guessing, and when it guesses wrong, it removes bits of you.

Here is what the common call apps offer, as of October 2026:

Sources: Zoom, Microsoft, Google, Discord, Telegram, Apple.

A few things that table does not show.

Auto is not a weak setting. In Zoom and Teams the default adapts to what it hears. Jump straight to High only when there is a specific problem, like a family member talking in the same room, because the stronger the suppression, the more it has to decide what counts as voice.

More is not better in a quiet room. Discord's own FAQ says that in a quiet room with a high-quality mic, Krisp may lower voice quality and suggests leaving it off (Discord Support). A suppressor with nothing to remove still processes your voice.

Do not stack three suppressors. On a Mac it is easy to end up with macOS Voice Isolation, the app's own suppression and a third-party filter all running in a chain. Each stage works on audio the previous one already altered, and each makes its own guesses about where a word ends. Run one strong stage, set the others to Low or off, then record yourself and compare.

Music and singing need it off. Zoom states that Original sound for musicians disables noise suppression, and Meet tells you to switch noise cancellation off if you need sounds like music in the meeting. A suppressor treats a held note on a guitar exactly like a fan.

For streams and recordings, OBS has its own Noise Suppression filter with RNNoise (the default, higher quality, more CPU) and Speex (OBS Knowledge Base). Its third option, NVIDIA Noise Removal, depends on NVIDIA's Broadcast stack, which is Windows-only with an RTX graphics card (NVIDIA). On a Mac, that line in OBS will not help you.

When it hums instead of hissing

If the noise is a steady low tone that does not change when you move the mic away from the fan, stop adjusting software. That is usually electrical. Mains power runs at 50 Hz in the UK and Russia and 60 Hz in the US (Wikipedia), and the hum it causes sits at that frequency and its multiples, 100 or 120 Hz and up (Wikipedia). A common cause is a ground loop: two pieces of gear connected by audio cable and also grounded through different power paths (Io Audio).

A ten-minute diagnosis, one change at a time:

1. Unplug the laptop charger and listen. If the hum stops, the power path is involved.
2. Move the USB mic to a different port, or plug it straight into the Mac instead of through a hub or dock.
3. Move the mic cable away from power bricks, monitor power cables and desk lamps.
4. If you use an audio interface and powered speakers, disconnect the speakers and listen again.

Noise suppression may turn a hum down, but it is treating a symptom with a tool built for something else. Fixing the cable path removes it for good.

How to remove background noise from your mic for good: the order that works

Every step above has a place. The mistake is doing them in the wrong order, reaching for software first because it is the step that feels like a fix. The order that holds up for calls:

1. Distance      mic 10 to 15 cm from mouth (laptop: raise it, external keyboard)
2. Direction     cardioid pattern, back of the mic toward the loudest source
3. Gain          input volume down until your normal voice peaks around -12 dB
4. Room          close the window, door shut, fan off during the call
5. Suppression   one stage only, on Auto or Low; raise it only for a real problem
6. Gate          for streams and recordings; on calls, only if suppression is off
7. Check         record 30 s: 10 s silent, 20 s talking; play it back on headphones

The -12 dB peak in line 3 is a working target that leaves headroom so loud laughs do not distort. Where your meter shows it depends on the app; the point is to stop riding the slider at maximum.

Step 7 is the easiest to skip, and it is the only one that tells you what the other side hears. Your own ears are useless here: you hear yourself through your skull, and you have tuned out the room. Ten seconds of recorded silence tells you more than an hour of adjusting sliders. The guide on how to hear what others hear on a call has the quickest ways to do it in each app.

Where TunedMic fits, and where it does not

Everything above is free, and for a lot of readers it is enough. The case where it stops being enough on a Mac is the one with many apps. Zoom has four suppression levels, Meet has an on and off switch, Telegram documents a toggle for group chats, and your podcast tool may have none. You end up tuning the same voice five times, and each app makes a different guess.

TunedMic takes a different route. It adds a virtual microphone to the Mac, and any app where you can pick a mic (Zoom, Meet, Teams, Slack, Telegram, Discord, OBS, FaceTime, the browser) can use it. Your real mic stays as it is; TunedMic processes its sound on the Mac in real time and every app gets the same result. Setup is a one-minute Sound Check: you read a short passage aloud and it takes more than 30 measurements of your voice, your mic and your room. Noise and room echo are among the optional manual controls, next to clarity, loudness and a 12-band equalizer. Processing stays local, and it adds less than a tenth of a second of delay.

What it is not: a way to skip steps 1 to 4. No processing removes every noise, and TunedMic does not claim to. A mic at arm's length in a room with a running washing machine is still a hard case for any software, and the honest fix is still to move the mic. If you use TunedMic, make it the one strong processing stage and set the app's own suppression to Low or off, then compare.

The limits are concrete. It needs a Mac with Apple silicon (M1 or newer) and macOS 14 or later. There is no Windows version and no refunds, but you get 3 free days to test it against your own noise. You can also listen right now: the home page has real before and after recordings from three mics: a MacBook's built-in mic, a cheap wired headset and a Hollyland Lark M2 clip-on, and on one Lark take a Dyson hair dryer runs about a meter (3 ft) away. If you were going to spend an evening tuning five apps one by one, listen to the dryer take first and then check the price.

Quick answers

Does a noise gate remove background noise while I talk? No. It mutes the pauses. Noise under your voice needs distance or suppression.

Why does my mic pick up background noise only on some apps? Each app runs its own processing. Zoom on Auto and Meet with cancellation off will sound different from the same mic.

Will a more expensive mic fix it? Only if it changes distance or direction. A sensitive condenser on a desk far from your mouth can pick up more room than a cheap headset boom at your cheek.

Is Voice Isolation on the Mac enough? In apps that support it, it may be. Apple's page describes it as prioritizing your voice and minimizing background noise. Check whether your call app shows the Mic Mode option at all; Apple says the options vary by app.

What to do in the next ten minutes

Open the app you use for tomorrow's call. Record half a minute at your usual position: ten seconds of silence, then talk. Play it back on headphones and note what you hear in the silent part. Then move the mic to a hand's width from your mouth, pull the input slider down until the level matches, and record again. Compare the two silent sections. Whatever is still there after that second take is what the rest of this guide, or any software, actually has to deal with.