How to Enable and Tune Zoom's Background Noise Suppression

QC By the Call Tonic Team Published: July 28, 2026 Last updated: July 28, 2026

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Zoom's noise suppression lives under Settings → Audio → Microphone modes. Make sure the mode is set to Noise removal, then pick a level: Medium removes constant noise like fans in a normal room, while High strips everything that isn't speech — the right choice for loud environments. The default, Auto, only reduces noise when Zoom decides it's needed, which is why plenty of noise still gets through out of the box.

Menu paths checked against Zoom's official documentation (Zoom Workplace desktop app, Windows & macOS) — July 2026.

1. Set the noise removal level manually

Auto is fine for quiet rooms, but it's reactive — it waits to detect noise before suppressing it. Setting a level yourself is the single highest-impact change:

Open the Zoom desktop app and click your profile picture, then Settings.
Select the Audio tab.
Scroll to Microphone modes and make sure Noise removal is selected.
Choose a suppression level: Auto, Low, Medium, or High.
Speak a test sentence with your usual background noise present, then adjust one level at a time.

Why this works: the levels trade fidelity for filtering. Low preserves the natural sound of the room, Medium is built for steady noise (fans, air conditioning, hum), and High removes everything that isn't recognised as speech. When it doesn't: High leans on your CPU — on older laptops it can cause stutter, so drop to Medium if your audio starts breaking up.

2. In a crowded space, try Personalized audio isolation

If your problem is other people's voices rather than mechanical noise, standard suppression won't help much — voices are speech, which is exactly what it's built to keep. Zoom's answer is a mode that learns your voice specifically:

Go to Settings → Audio → Microphone modes.
Select Personalized audio isolation.
Follow the prompt to record a short voiceprint sample.

Why this works: instead of asking "is this speech?", Zoom asks "is this your speech?" — so background conversation gets filtered along with the rest. When it doesn't: the voiceprint is per-account and per-device, and it needs a decent sample; in our checks of Zoom's docs it's positioned for crowded environments, not as an everyday default.

If the noise persists

When Zoom's filter isn't enough

Zoom can only clean audio inside Zoom. If your environment is genuinely loud — street noise, kids, a mechanical keyboard — a system-level tool like Krisp filters your microphone before any app hears it, in both directions, and its 7-day free trial (no card required) is enough to tell whether it beats your in-app settings.

Try Krisp free Read our full Krisp overview →

3. Check you're not stuck in "Original sound"

Zoom includes Original sound for musicians — a mode that deliberately disables noise suppression and echo cancellation for music fidelity. If you (or a livestream tutorial) ever enabled it, your suppression settings are being ignored:

In Settings → Audio → Microphone modes, check whether Original sound for musicians is the active mode.
Switch back to Noise removal.
In your next meeting, glance at the top-left of the meeting window — if an "Original sound" toggle is showing, make sure it's off.

Why this works: the musician mode isn't a level, it's an off-switch for the whole processing chain — including the suppression you think you've configured. It's the most common reason "my noise suppression stopped working" reports check out.

4. Adjust the level mid-meeting

You don't need to leave a call to change suppression:

In the meeting toolbar, click the ^ arrow next to Mute.
Select Audio settings — this opens the same Audio tab.
Change the Noise removal level; it applies immediately.

Why this works: Zoom applies microphone-mode changes live, so you can step up to High the moment the neighbour starts mowing, and back down after.

Still not fixed?

If noise is still getting through after all four fixes, the cause is usually outside Zoom:

Microphone position — a laptop mic 60cm away picks up the whole room; any headset mic 3cm from your mouth will beat it.
OS input level — if your system input volume is boosted near maximum, you're amplifying the room before Zoom can filter it.
Another app holding the mic — audio software with its own processing (or a second meeting app) can fight Zoom's filter chain.
Driver-level "enhancements" — on Windows, audio-driver effects can double-process your mic; try disabling them in Sound settings.

Frequently asked questions

Does High noise suppression make my voice sound worse?

It can. High is the most aggressive filter and may clip the edges of quiet speech or add a slightly processed quality, and Zoom notes it can increase CPU usage. If callers say you sound muffled, step down to Medium.

Why can I still hear my fan on the lower settings?

Low is designed to preserve the original sound and only applies minimal reduction, so steady noise like fans or air conditioning passes through. Medium is the first level that's built to remove that class of constant background noise.

Does Zoom noise suppression work on Linux?

Yes — Zoom's Linux client supports controlling the background noise suppression level, though some related audio features available on Windows and macOS are limited on Linux.