Most of the time when you record audio yourself, you will get some additional white noise. This can be very annoying at times especially if you were recording something that would be played loud such as a song. However you can remove a good amount of that white noise for free and it only takes a few minutes!
- Launch Audacity and open up the sound file you wish to remove the white noise from.
- Find a spot in the recording where there is no sound except the white noise, you will want atleast 2 seconds. The sound wave will be very small at this part.
- Zoom in and navigate to that spot, to zoom in go to View in the menu bar and select zoom.
- Now highlight the portion of the sound wave which has only the white noise.
- Go to Effect > Noise Removal
- Click on Get Noise Profile
- Now select the portion of the wave you want to remove the noise from, if it’s the entire file you can go to Edit > Select > All
- Go back to Effect > Noise Removal
- Now select get noise, give it a few moments and click play and sample the new audio.
- You can save the file by going to File > Export As…
- If the noise is not gone: to Edit > Undo Noise Removal, navigate back to Effects > Noise Removal and move the slider to the right and try again. If you move it all the way to the right and its still there you will need to start over and select a different portion of the “noise profile” mentioned in steps 2-6
- If you removed other noises besides just the noise go to Edit > Undo Noise Removal, and move the slier to the left and try again. If you move it all the way to the left and its still there you will need to start over and select a different portion of the “noise profile” mentioned in steps 2-6
- If recording yourself or a phonecall, wait 5 seconds after you hit record and give it some time after you hit stop. This will give you large samples to eliminate the white noise in the future. If the noise is not present you can just trim it out