Noise Reduction – How to Remove Noise from Audio Files – Audacity Tutorial (Part 01) with an Introduction

As content creators (Video/Audio Editors), some have to face a troublesome problem when applying sound recordings / stored audio files to an editing workspace because of background noise. So they are tempting to use Noise Reduction feature in the software they use. Then they can simply remove noisy background sounds. Do you know how to Reduce Noise? I will show you how to remove noise from audio in Audacity software.

When talks about Audio Editing applications Adobe Audition, Logic Pro X, GarageBand, Audacity, FL Studio, WavePad are some of the Most Popular for now. Most of them are Expensive and must Buy to use properly with full features. But we can use the Audacity software totally free of charge. It can do a lot of Audio Editing things & it is a valuable smart application. It can make a lot of changes to sound files. Every feature comes with it Free & there is everything we need often.

An Introduction to Audacity

“Free, Open Source, Cross-Platform Audio Software”

Audacity is a Digital Audio Editor & a Recording Application Software which available for Windows, macOS, GNU/Linux, and other Operating Systems. Developed by a group of volunteers as open source. The executable (.exe) file size is less than 100MB. Audacity is an Easy-to-Use Multi-Track Audio Editor and Recorder. I think still Best Free Audio Editor for Windows is this.

Audacity - Best Free Audio Editing Software
Audacity – Welcome Screen

Users can record live audio through a mixer or a microphone & Digitize recording from other media. You can combine sound files and export recordings in various formats & supports 16-bit, 24-bit, and 32-bit. Also, support for LADSPA, LV2, Nyquist, VST, and Audio Unit effect plug-ins.

Download Audacity

Audacity® software is copyright © 1999-2020 Audacity Team. Web site: It is free software distributed under the terms of the GNU General Public License. The name Audacity® is a registered trademark of Dominic Mazzoni.

Citations – Audacity

As the First Lesson of the Audacity Tutorial on my website, I will show you How to Remove Noise from an Audio file / Soundtrack or Reduce the Noise. Noise Reduction can reduce constant background sounds.

READ CPU-Z Review | How to find Hardware Specs – Best Software to view Computer Hardware Details.

How to Remove / Reduce Noise from an Audio File in Audacity

This is a very simple & easy thing as a basic noise reduction. Follow the instructions below.

First of all, DownloadInstall and Open the Audacity audio editor.

Then Import your Sound Track / Audio File that you need to remove noise. You can simply Drag & Drop it to the Audacity editing Timeline.

Import to Audacity Warning
Import Warning in Audacity

When Importing a file, it warns you to choose an import method. I recommend you to select ‘Make a copy of the files before editing (safer)’.

If you Imported a Stereo Sound Track, you would see two separate sound waves. If you Imported a Mono Sound Track, you would see only one sound wave in the timeline.

Stereo sounds in audacity
Mono sounds in audacity.

I am using a Mono Audio recording in this guidance.

Remove Noise from Audio

Now Play & Listen to the soundtrack carefully. Try to recognize a time period where you hear only noisy sounds from the background. You can select a ‘silent‘ section of your audio, where it’s just noise.

Find Background Noise
The silent section where is Only a NOISE.

Then go to the Effects from Menu in the top and click Noise Reduction (It was ‘Noise Removal‘ earlier). Again click Get Noise Profile.

Get Noise Profile in Audacity
Get Noise Profile

Now select all of the audio from which you want that background noise removed, but if you want to remove noise from the full audio (if the noise is everywhere), select the whole soundtrack. You can use Ctrl + A keyboard shortcut to select all.

how to reduce noise in audacity
Selected All…

Go to the Effects tab and select Noise Reduction again. Change / Adjust the Settings only if it is necessary ( I think Defaults are fine 🙂 ). Then press, OK.

remove noise from audio with audacity
Applying Noise Reduction - audacity noise reduction

The task is Completed. That is how to reduce noise in audacity. Now you have removed noisy sounds from your audio. You can listen to the audio to ensure your audio doesn’t have noises like before. You’ll notice it clearly if you compared the Before-and-After Waveforms of the Audio.

EXTRA (Coming Soon…)

If the above details are not enough for you, the upcoming video will fill the blanks, and maybe you can get a decent idea about the process.


Also READ:- GIMP Tutorial (01) – How to add an Outline to a Text (with an Introduction to GIMP Software)

This is How Audacity Noise Reduction works. I hope this may be helpful to you.

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