---
title: "How to remove background noise from audio | ToolSugar"
description: "Remove background noise from a voice recording or video in your browser, and learn what the cleanup changes and what it leaves alone."
canonical: https://toolsugar.com/blog/how-to-remove-background-noise-from-audio
image: https://toolsugar.com/og.png
---

# How to remove background noise from a recording

Updated 2026-11-09

To remove background noise from audio, run the recording through a speech denoiser that keeps the voice and lowers everything else. Noise Remover does this with a small neural network that runs inside your browser, so the audio stays on your device. Load a voice note or a video, press the button, listen, and download the cleaned file.

[Open Noise Remover](https://toolsugar.com/tools/noise-remover)

## Clean up a voice recording in four steps

The tool accepts a recording or a video with speech in it. The model and its engine download once, about 37 MB in total, and then the work happens locally.

1. Choose a recording or a video with speech.
2. For audio, pick MP3, M4A or WAV as the output.
3. Press remove noise and wait while it processes.
4. Listen to the result, then download.

## What kind of noise it handles

The model is RNNoise, an open neural network trained for speech. It learns what a voice looks like and turns down what does not fit. Steady sounds such as a fan, a hum or room hiss are the easy case.

It is not built for music. A song has no single voice to protect, so the model may treat instruments as noise. For separating a voice from a song, use Vocal Remover instead.

## How much quieter does the noise get?

We tested a synthetic voice mixed with pink noise. The noise floor dropped from -38.7 dB to -84.3 dB, about 45 dB, while the speech level moved from -17.5 dB to -17.7 dB. That is one test file. Real recordings vary, and we have not measured other kinds of noise.

So check the result by ear before you use it. The tool has no strength control. The model decides for every 10 ms of audio what to keep.

## Why the output is mono

RNNoise works on a single channel at 48 kHz. A stereo recording is mixed down to mono first, then cleaned. For a voice note or a call this changes little. If the stereo image matters, keep your original file too.

With a video, the picture is copied untouched and the container stays the same, so only the sound changes.

## Questions

### Can I remove noise from a video file?

Yes. Choose the video and the tool cleans the sound track. The picture is copied without re-encoding and the container stays the same.

### Does it change how loud the voice is?

Barely. In our test the speech level moved by 0.2 dB while the noise fell by about 45 dB.

### Does the audio leave my device?

No. The model runs in the browser through WebAssembly. The only things downloaded are the engine and the model.

[Open Noise Remover](https://toolsugar.com/tools/noise-remover)

## Related guides

- [How to remove vocals from a song](https://toolsugar.com/blog/how-to-remove-vocals-from-a-song)
- [How to increase video volume in your browser](https://toolsugar.com/blog/how-to-increase-video-volume)
- [How to convert audio files to MP3, M4A or WAV](https://toolsugar.com/blog/how-to-convert-audio-files)
- [How to transcribe audio to text](https://toolsugar.com/blog/how-to-transcribe-audio-to-text)