How to Reduce Background Sound via Audacity Tool?

Have you experienced a continual and consistent hiss or whistling sound in the background while trying to do a simple voice narration? Then you do not need to worry about the issue. We are suggesting simple ways to resolve this issue. Please give a chance to Audacity software to reduce or remove background noise.

For the Windows users, Audacity is a free and cross-platform audio software. It is an open source and easy to use software for the Windows. In this post, we will cover a technique of splitting and merging Audio files with the help of Audacity. Today, in this article we will know how to reduce background noise in a recording via Audacity Tool.

Steps to Reduce or Remove Background Noise:-

The Audacity features ‘Noise Reduction’ audio effect. You can use this tool to remove or reduce some types of noise from a recording. This will works effectively with sounds such as- background hiss.

  • First, you need to select audio to reduce the noise levels, that is just the noise and create a ‘noise profile.’
  • When the Audacity gets the noise profile, it will automatically reduce any kind of loudness of noise in audio that you have select.
  • Add a voice file to the app to start the process. The Audacity tool can import any common audio file formats such as- WAV, AIFF, and MP3.
  • Then look at the stereo waveform.
  • Get the left channel in the top half of the track and the right channel in the bottom half.
  • Noticed that where the waveform reaches closer to the top and bottom of the track, the audio is louder.
  • Observe the stereo wave pattern to see which parts are quiet.
  • Click and drag over a quiet part and select it.
  • Then, move to Effects menu.
  • The Audacity tool comes with many built-in effects.
  • Apart from this, all of the effects have a dialog that will help you to hear the audio as changed by the impact before you apply the effect to the waveform.
  • After accessed, move to the ‘Noise Reduction’ and click on it to open a Window.
  • Next, search for the option reading ‘Noise Profile’ option, and then click on the Ok button.
  • Select the part of the sound file that has the voice over.

Suggestion- You can repeat the same process to sequentially and modify the noise reduction level if you want to do.

  • After completing all the above-given steps, select OK.
  • Then you will see, the file’s wave pattern is modified as the noise levels have been reduced, gradually.
  • Play the sound to check this level.

Audacity will save your time due to Spectral Selection capability. It is a characteristic feature within Spectrograms, that will help you to the frequency content of audio then edit selected frequencies.

Please note- This tool is especially useful for voice recordings. Among other purposes, Spectral Selection and editing can be used as mentioned below:-

  1. Enhancing certain resonances
  2. Changing the quality of a voice
  3. Removing the unwanted sound by eliminating frequencies
  4. Removing mouth sounds from voice work.

We hope that this post will works for you to reduce background noise in a recording via Audacity Tool.



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