Remove wind noise from audio
Gusty rumble in an outdoor recording? Reduce wind noise, compare before and after, and adjust Amount. Free in your browser, with no audio upload.
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What's happening
Wind noise is the rumble and popping you get when moving air hits the mic. Outdoors it comes in gusts, a low roar that swells and drops, sometimes with loud thumps that swamp the voice. It's worst on phones, action cameras and small clip-on mics without a foam or fur cover.
fix.fm looks for low, rumbling sound that swings up and down in gusts, which sets wind apart from a steady fan or traffic, and counts how much of the audible recording passes that check. Its warnings start at 5%; it calls wind severe at 35%. Those thresholds describe the detector, not how much speech can be recovered. The filter can thin a voice, so compare Before and After and lower Amount if needed.
How far the wind fix goes
The wind fix looks for one signature: low rumble that comes and goes in gusts. That is what moving air does on a capsule, and it is not what a plosive does, or a ventilation duct. The four cases below are the same clean reading with a different low sound added in software, so we know what was there and can measure what the fixer took, what it left, and what it cost the voice.
One clean reading with four low backgrounds added in software, then run through this page's fixer at full amount. Every clip is matched to -23 LUFS so only the background differs.
Clean reading
The reference. Nothing under the voice, nothing in the pauses.
Gusty wind, 22 dB under
A breeze on a clip-on mic. A low roar that swells and drops on its own schedule, loudest when it happens to land on a pause.
Gusty wind, after the fix
The roar is gone. Listen to the low end of the voice against the clean reading: it is still there.
Heavy wind, 3 dB under
Filming into the wind. The gusts land on the words and bury their low end.
Heavy wind, after the fix
Usable again. The voice is a little thinner than the clean reading, because the cut had to come up to where the wind stopped.
Plosives, 8 thumps
A P or a B right into the capsule: a short low thump at the start of a word, then nothing until the next one.
Plosives, after the fix
Identical to the recording. The check counts how much of the file rumbles, and eight thumps is almost none of it.
Steady rumble, 22 dB under
The same low sound with no gusts, like traffic through a wall or a ventilation duct.
Steady rumble, after the fix
Identical to the recording. Nothing swelled or dropped, so the check did not call it wind.
Public-domain LibriVox voice. The wind is low-passed brown noise with a gusting envelope, the thumps are damped 50 Hz tones placed at word starts, and the rumble is the same bed held steady; none of it was recorded with real moving air on a real capsule. So the clean version really is what was there before.
| Case | The check | Rumble in the pauses | Loudest 50 ms of rumble | Voice body |
|---|---|---|---|---|
| Clean reading | 0% windy, fine | -77.2 dBFS | -32.7 dBFS | -28.5 dBFS |
| Gusty wind | 19.7% moderate to 0% fine | -39.3 to -59.1 | -29.6 to -32.9 | -28.5 to -28.6 |
| Heavy wind | 71.3% severe to 0% fine | -20.3 to -54.1 | -11.5 to -40.7 | -25.7 to -29.1 |
| Plosives | 0% fine to 0% fine | -77.2 to -77.2 | -15.3 to -15.3 | -27.2 to -27.2 |
| Steady rumble | 0% fine to 0% fine | -40.1 to -40.1 | -32.2 to -32.2 | -28.5 to -28.5 |
The gusts are the case the fixer is for. The check reads 19.7% of the recording as windy, moderate; after the fix it reads none, the rumble in the pauses is down 19.8 dB and the body of the voice has moved 0.1 dB from the clean reading. The high-pass sits as low as the wind allows, and the gusts above it are turned down only while they blow.
Heavy wind, 71.3% windy and buried to -11.5 dBFS at its worst, also comes out reading fine, with the rumble down 33.8 dB. The cost is 0.6 dB of voice body, because the cut has to climb to where the voice stands clear of the wind. You hear it as a slightly thinner voice. That is the trade the fixer makes for you; it does not try to rebuild low end the wind covered.
The plosives are the case people bring here that this fix is not built for. 8 thumps take the loudest 50 ms of rumble from -32.7 to -15.3 dBFS, but they fill so little of the recording that the check reads 0% windy and the fixer returns the file unchanged. A pop needs a repair aimed at that tenth of a second, which fix.fm does not have yet. Until it does, a pop filter and talking past the mic rather than into it are the fix; recording a clear voice covers both.
The steady rumble is the other way to be low without being wind. It sits -40.1 dBFS in the pauses, about what the gusts average, and the check reads it fine, because nothing about it swings. The fixer leaves it alone on purpose. For a steady bed the noise fix is the right tool, and hiss, echo and hum explains how to tell the low sounds apart first.
What this does not prove: real wind is not brown noise with an envelope. It has turbulence that reaches higher than 150 Hz on small capsules, it differs between the two sides of a stereo mic, and it can overload a capsule outright, which no filter undoes. The numbers above say what the fixer does to the signature it looks for; how we test has the pass marks behind the check.
How it works here
- 01
Finds the gusts
It looks for low rumble that comes and goes, which is how wind sets itself apart from a steady fan or traffic.
- 02
Cuts the rumble
A steep low-frequency filter and changing attenuation reduce the rumble. They can also thin the voice: compare Before and After, then lower Amount if needed.
- 03
Stays on your computer
Your file is never uploaded. The fix runs in this browser tab.
Questions
Can wind noise be removed completely?
It can reduce gusty rumble, but wind overlaps the low end of a voice too. Stronger repair can sound thinner. A gust that hides a word or overloads the microphone cannot be undone by this filter. Use Before and After to choose an Amount that helps your recording.
Does it fix popping P and B sounds?
Not reliably. Short mouth pops differ from sustained wind gusts, and the wind fixer can leave them unchanged. Our listening examples show that limit. A pop filter and speaking slightly past the microphone help prevent them next time.
Is my audio uploaded anywhere?
No. The file is read and fixed inside this browser tab and never leaves your computer.
Can I remove wind noise from a phone or GoPro video?
Yes. Drop in the video file and fix.fm cleans its sound. You download the fixed audio as WAV or MP3 and put it back under the video in your editor.
How do I stop wind noise next time?
Use a fluffy windscreen, often called a dead cat, on the mic. Foam alone helps a little. Stand with your back to the wind, and keep the mic close so the voice is louder than the air.