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Audio Noise Reducer

· Last updated：2025-10-02

Remove background noise from audio files using various noise reduction algorithms

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Written by the Elysia Tools team
Audio312
Files143
Noise35
Background31
Noise Reduction10

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category
Media
Input types
file, select, range
Output type
file
Sample coverage
4
API ready
Yes

Overview

Audio Noise Reducer removes background noise such as hiss, hum, and unwanted high- or low-frequency sound from supported audio files. Upload an audio file, choose a reduction algorithm and strength, then download the cleaned result in MP3, WAV, FLAC, AAC, OGG, or M4A format.

When to use

  • Clean speech recordings affected by background hiss or room noise.
  • Reduce low-frequency hum in interviews, voice notes, or recorded presentations.
  • Lower high-frequency noise in audio before exporting it in your preferred format.

How it works

  1. 1Upload one supported audio file, such as MP3, WAV, FLAC, AAC, OGG, MP4, or M4A.
  2. 2Choose a noise reduction algorithm, including FFT Denoiser, high-pass, low-pass, combined, mild, or aggressive reduction.
  3. 3Adjust the noise reduction level from 0.1 for light reduction to 1.0 for maximum reduction.
  4. 4Select an output format and generate the processed audio file.

Use cases

  • Cleaning interview recordings with background hiss or room noise.
  • Reducing electrical hum in voice notes and presentation recordings.
  • Preparing noisy audio for export as a compact or lossless file.

Examples

1. Reduce hum in an interview recording

Podcast editor

Background

An interview recording contains a noticeable low-frequency hum beneath the speaker's voice.

Problem

The hum distracts from the conversation and needs to be reduced without using a broad high-frequency filter.

How to use

Upload the interview audio, select High-Pass Filter, choose 60 Hz or 80 Hz, set a moderate noise reduction level, and select WAV as the output format.

Algorithm: High-Pass Filter; High-Pass Frequency: 80 Hz; Noise Reduction Level: 0.5; Output Format: WAV

Outcome

The exported WAV file has reduced low-frequency background hum.

2. Clean hiss from a voice note

Content creator

Background

A voice note recorded with a phone includes steady high-frequency hiss.

Problem

The hiss makes the spoken audio sound less clear in the final recording.

How to use

Upload the audio file, choose FFT Denoiser, set the reduction level around 0.5, and export the result as M4A.

FAQ

What audio files can I upload?

You can upload MPEG, WAV, FLAC, AAC, ADTS, OGG, MP4, or M4A audio files.

Which noise reduction algorithm should I choose?

FFT Denoiser is the recommended general-purpose option. Use high-pass for low-frequency noise, low-pass for high-frequency noise, or Combined for both.

What does the noise reduction level control?

It controls the reduction strength from 0.1, light reduction, to 1.0, maximum reduction. Higher values may remove more audio details.

Can I target low-frequency hum?

Yes. Select the High-Pass Filter or Combined algorithm and choose a high-pass frequency such as 60 Hz or 80 Hz.

Which output formats are available?

You can export the processed audio as MP3, WAV, FLAC, AAC, OGG, or M4A.

Hub

Audio Restoration, Noise Repair, and Cleanup Tools

Diagnose and repair clicks, hum, clipping, crackle, room sound, hiss, and harshness without promising lossless restoration.

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Algorithm: FFT Denoiser (Recommended); Noise Reduction Level: 0.5; Output Format: M4A

Outcome

The processed M4A file contains reduced background hiss.

3. Apply stronger reduction to noisy audio

Audio archivist

Background

An older recording contains both low-frequency rumble and high-frequency background noise.

Problem

A single frequency filter does not address both types of unwanted sound.

How to use

Upload the recording, select Combined, choose a higher reduction level such as 0.8, and export it as FLAC.

Algorithm: Combined (High + Denoise + Low); Noise Reduction Level: 0.8; High-Pass Frequency: 80 Hz; Low-Pass Frequency: 8000 Hz; Output Format: FLAC

Outcome

The exported FLAC file has reduced low- and high-frequency background noise.