How do I remove background noise from a YouTube video?

The steps at a glance

Each kind of noise has its own tool, and the order matters, because every pass takes a little of the voice with it:

1. Listen to a pause and name the noise.
2. Measure the noise floor and hum with the free checker.
3. Remove hum with a narrow filter first.
4. Lower steady noise with light noise reduction.
5. Use AI voice cleanup only for noise that changes.
6. Keep the voice natural: blend, listen to what you removed, stop early.
7. Treat echo as its own problem.
8. Measure the export again, then mix and set the loudness.

Step 1: Listen to a pause and name the noise

Each tool is built for one kind of noise, so first find out which one you have. Solo the voice track, find a few seconds where nobody talks and listen on headphones:

• Steady hiss or fan: a computer fan, air conditioning, a preamp turned up too far. Regular noise reduction handles it best.
• Hum: a low tone from the electrical mains at 50 or 60 Hz, depending on where you record, plus multiples of it. A hum filter removes it almost without touching the voice.
• Noise that changes: traffic, voices next door, a dog, keyboard clicks, background music. It never repeats, so a filter that learns a noise profile cannot catch it. This is the job for AI voice isolation.
• Echo: the room answering back. That is reverb, not noise (Step 7).

Game audio, music and sound effects should sit on their own tracks, because every tool below treats everything on a track as voice or noise. How to record gameplay for your editor shows how to keep them apart.

Step 2: Measure the noise floor and hum with the free checker

Ears get used to a fan within minutes, so measure it. My free background noise checker reads the noise floor (the level of the steady quiet stretches), the gap between your voice and that floor, any mains hum at 50 or 60 Hz and the amount of hiss, then jumps to the quietest second so you can hear it. The file is analysed in your browser and never uploaded.

The thresholds are my editing rule of thumb, not an official standard. Check the raw recording, before any noise suppression from your recording app. If the floor looks high only because the voice is quiet, the fix is the mic level: see how to set mic levels for YouTube.

Step 3: Remove hum with a narrow filter first

Hum lives at a few exact frequencies, the mains frequency and its multiples, so a narrow filter takes it out and leaves the voice between them alone. That is why it goes before anything broader.

• Premiere Pro: mark the clip as Dialogue in Essential Sound, expand Repair and check DeHum (sliders run 0 to 10). For more control, the DeHummer effect in the Noise Reduction/Restoration category sets the frequency, width, amount and harmonics, and Output Hum Only plays what it removes.
• DaVinci Resolve: drag the De-Hummer from the Fairlight FX in the Effects Library onto the clip, or onto a mixer channel for the whole track. It has 50 Hz and 60 Hz buttons, Amount, a Slope control that shifts the work toward the harmonics, and Listen to Hum only.
• CapCut: CapCut’s own article says its noise reduction covers power-line hum too; there is no separate hum filter in the steps it describes.

Step 4: Lower steady noise with light noise reduction

For hiss, fans and air conditioning, use regular noise reduction on the voice track:

• Premiere Pro: Essential Sound, Repair, Reduce Noise, or the DeNoise effect (0% to 100%), which Adobe says covers hum, hiss, fans and air conditioners. The right amount, in Adobe’s words, “depends on the type of background noise and the acceptable loss in quality for the remaining signal”.
• DaVinci Resolve: the Noise Reduction Fairlight FX, with De-Hiss and De-Rumble presets. It detects noise in a selection automatically, or you select pure noise and click Learn. Raise Threshold when the voice sits close to the noise; Sensitivity removes more noise and, the manual warns, more dialogue too; Level adds back up to 18 dB. Blackmagic does not mark it Studio only.
• CapCut: select the clip, open the Audio tab on the right, switch on Reduce noise and set the intensity, as CapCut’s guide describes. CapCut moves features between updates, so look in the clip’s audio settings if the name differs.

Record a few seconds of silence at the start of every session: it gives a learning filter a clean sample of the room.

Step 5: Use AI voice cleanup only for noise that changes

AI voice tools keep what sounds like a voice and drop the rest, which is what traffic, voices and background music call for:

• Premiere Pro, Enhance Speech: select the dialogue clip, open Essential Sound and click Enhance; it runs in the background, and the Mix Amount slider blends enhanced and original audio. Adobe says it supports mono and stereo files only, not multichannel audio or nested sequences, and returns a stereo clip as a mono downmix: fine for a voice, wrong for stereo music or game audio.
• DaVinci Resolve, Voice Isolation (Studio only): in the Audio tab of the Inspector for a clip, or the Track FX of the Fairlight mixer for a track. Blackmagic’s manual says an Amount of 50 is roughly an equal mix and “values between 70 and 80 work well for natural results while strongly isolating the source”. It works on mono, stereo and dual-mono tracks only.
• CapCut: CapCut’s pages also describe an Enhance voice option; which one you see depends on your version.

Blackmagic lists music playing under the dialogue among the sounds Voice Isolation removes. Run these tools on the voice track only, never on a track that also carries music or game sound.

Step 6: Keep the voice natural

Over-processed dialogue sounds watery, metallic or robotic: consonants smear, word endings vanish, the background breathes between sentences. It means the tool is removing part of the voice. To avoid it:

• Stop early. Use the lowest setting that makes the noise stop distracting, not the one that makes it vanish. A little steady room sound reads as natural; a voice with holes does not.
• Blend. Mix Amount, Amount and Dry/Wet all bring some of the original back.
• Listen to what you removed. Listen to Noise Only and Listen to Hum only in Resolve, Output Hum Only in Premiere. If you hear words in it, back off.
• One strong tool, not three. Reduce Noise, DeNoise and Enhance Speech stacked at full strength pile up their artifacts.
• Clean before you level. Compression lifts the quiet parts, and the noise between words is a quiet part.
• Check on headphones and on a phone speaker. One reveals artifacts, the other tells you if the voice is still clear.

Step 7: Treat echo as its own problem

Echo is the room’s reflections, not noise, so turning noise reduction up only adds artifacts. Use a reverb tool on the voice track, and use it lightly:

• Premiere Pro: Reduce Reverb in the Repair section of the Essential Sound panel, or the DeReverb effect.
• DaVinci Resolve Studio: the Dialogue Separator, applied to the whole track, gives the dialogue, the background and the room ambience their own levels, so you can turn the room down. Blackmagic marks it Studio Version Only and mono only: split a stereo source into dual mono first.

The lasting fix is the room: soft things around you and the mic closer. My room echo checker estimates how echoey a recording is, so you can compare before and after a change, and how to reduce echo in voice recordings covers the room and the plugins step by step.

Step 8: Measure the export again, then mix and set the loudness

Run the cleaned export through the checker again and compare it with the first reading. Then mix: normalizing raises the noise along with the voice, so cleanup comes before normalizing to -14 LUFS for YouTube, and music goes under the voice at the levels measured in background music under a voiceover.

How I handle noise on client videos

On every video I edit, cleaning the noise out of the audio is part of the job, so the creator only has to record. For English by Erin Marie, an English teaching channel, the audio carries the lesson, so it is the first thing cleaned: the room echo comes out and every take is brought to the same voice level, so no example drops in volume. To hand the whole mix over, see sound design and mix.

Background noise FAQ

Can you remove background noise from a video after recording?

Usually you can lower it a lot. Steady noise such as hiss, fans and electrical hum comes out cleanly with a noise reduction or hum filter. Noise that changes, such as traffic or other voices, needs an AI voice tool like Premiere Pro’s Enhance Speech or DaVinci Resolve Studio’s Voice Isolation. Strong echo, or noise as loud as the voice, rarely comes out without hurting the voice, so a quieter room and a closer mic are still the best fix.

Why does my voice sound robotic after noise reduction?

The tool is removing part of the voice along with the noise. Lower the amount, mix some of the original back in with Mix Amount, Amount or Dry/Wet, and use one strong tool instead of several. Listen to the removed signal: if you can hear words in it, the setting is too strong.

How do I remove a hum from my audio?

Use a hum filter set to the mains frequency, 50 or 60 Hz, and its harmonics. In Premiere Pro that is DeHum in the Essential Sound panel or the DeHummer effect; in DaVinci Resolve it is the De-Hummer Fairlight FX, which has 50 Hz and 60 Hz buttons. A free background noise checker tells you which frequency your hum is at.

Is Voice Isolation free in DaVinci Resolve?

No. Blackmagic’s DaVinci Resolve 21 manual marks Voice Isolation as Studio Version Only. The Noise Reduction and De-Hummer Fairlight FX are not marked that way, so they are the tools to start with in the free version.

Does Enhance Speech in Premiere Pro work on stereo audio?

It accepts mono and stereo files, but Adobe says a stereo clip comes back as a mono downmix, and it does not support multichannel audio or nested sequences. Use it on the voice track, not on stereo music or game audio.

Does YouTube remove background noise for me?

Not reliably. YouTube Help describes Voice boost, a player option that reduces background sound and highlights speech, but it is not available for all videos and the viewer has to turn it on. Creators can also switch YouTube’s audio enhancements off for future uploads in YouTube Studio. Clean the file before you upload it.

Sources

• Premiere Pro: Adobe Help, Apply Enhance Speech, Enhance Speech technical requirements, Repair dialogue and Apply audio effects (DeNoise, DeHummer, DeReverb), last updated January 7, 2026, read October 20, 2026.
• DaVinci Resolve: Blackmagic Design, DaVinci Resolve 21 Reference Manual (Fairlight FX; Voice Isolation; Dialogue Separator, Studio Version Only, mono only) and the Fairlight page (Learn, Effects Library), read October 20, 2026.
• CapCut: its articles Noise Reduction: A Guide to Mastering Audio and How to Use an MP3 Normalizer, and the help note on UI changes after updates, read October 20, 2026.
• Voice boost and the Studio setting: YouTube Help, Control video volume on your device and Video and audio quality enhancements, read October 20, 2026.
• Thresholds: my rule of thumb on the background noise checker page. Erin Marie lessons: the English teaching channels page.