Labelled in the pauses.
The repair labels steady noise when the quiet moments have a flat spectrum, hold steady within 7.5 dB and sit 26 dB or less under the loud parts. A fan close to the microphone usually does.
SOLIPSIUM Super resolution audio engine
Fan noise
Remove fan noise from a recording.
Drop a recording with a computer, laptop or desk fan behind the voice. Solipsium measures the noise in the pauses before it lowers anything.
Drop a recording with fan noise
Solipsium checks it in your browser for clipping, hum and noise, without uploading it. It can then repair the first 20 seconds for you to hear, with no account.
WAV, MP3, M4A, MP4 and more, up to five minutes for the check.
Your first 20 seconds
After signing up, drop the same file into the editor to repair all of it.
What Solipsium hears
Make a free account to repair the whole recording
Then drop the same file into the editor. Scans and short repairs are free.
What fan noise is
A steady rush, and sometimes a whine.
A fan moves air past its blades and casing. Most of what you hear is a broad rush, much like hiss but lower.
A fan that speeds up.
A laptop fan that ramps up halfway through changes the level of the pauses, and a floor that moves too far is not labelled steady. A listening model then decides whether speech cleanup runs.
A whine is not hum.
Some fans add a thin tone from the blades or the motor. Only mains hum at 50 or 60 Hz and its multiples is notched, so a fan's whine at another pitch stays.
How it is lowered
Full-band speech cleanup.
The try repairs the first 20 seconds on Solipsium's server and lists a reason for each step.
A speech model.
DeepFilterNet3, a speech model, lowers parts of the recording's own spectrum around the voice and writes no new sound. The result reads: “A steady noise floor was found, so it is removed.”
Quieter fans.
A fan more than 26 dB under the voice is not labelled. When the listening model hears damage the cleanup clearly reduces, the result reads: “Nothing was measured wrong, but a listening model heard damage that speech cleanup clearly reduced, so speech cleanup is used.”
Next time.
Put the microphone on the far side of you from the computer, raise a laptop off a soft surface so it runs cooler, and close heavy programs before you record.
Questions
About fan noise.
Do I need to record a sample of the fan?
No. The repair measures the noise in the recording's own quiet moments.
Will the voice sound thin?
It can. The editor's note on this cleanup reads: “Targets hiss in speech. Check quiet or distant voices; may remove music and ambience.” Switch between Original and Repaired as they play, on one clock, and keep the original if the voice sounds worse.
Why was my fan left alone?
Either it sat more than 26 dB under the loud parts, or its level moved too much to count as steady, and the listening model did not hear damage the cleanup clearly reduced. The 20 seconds then come back as they were. In the editor you can run Full-band speech cleanup on it yourself.
There is hum as well.
Mains hum at 50 or 60 Hz is notched out before any cleanup, so a recording with both gets both repairs.
Fan noise under music?
Solipsium's free try is built for speech, and its cleanup may remove music. Where held musical tones sit under the noise, cleanup stays gentle and lowers the noise by at most 6 dB.
Is my recording uploaded?
Not for the check, which runs in your browser. Pressing Repair the first 20 seconds sends those 20 seconds; when your browser could not open the file, or it runs over five minutes, the file itself goes to Solipsium's server, so the try is offered for it only up to 25 MB. Solipsium keeps only the first 20 seconds and deletes them within an hour. If you are signed in, a file you drop or choose is uploaded to your account and opens in the editor instead. The privacy notice has the rest.
Free audio tools
Related free tools.
For other steady noise.
- Remove background noise
Noise, hum and clipping, checked together.
- Remove hiss and static
Steady hiss from a tape or a preamp.
- Clean up a meeting recording
A laptop microphone's fan, hum and clipping.
- Online voice recorder
Record a new take with a live level meter.
- All free audio tools
Every free tool on one page.
The whole recording.
Make a free account and drop the same file into the editor to repair all of it, up to 30 minutes at a time.
Repair the whole recording
Free account, no card.