In this video, you’ll learn how to remove unwanted background noise using Audacity.
It’s a real downer when you capture an amazing interview or voice-over narration, only to realize that the neighbor’s lawnmower was running in the background.
Noise reduction allows you to remove certain audio frequencies while minimizing the impact on the parts you want to keep (namely, your voice).
There are 3x steps to applying noise reduction in Audacity.
1. Get A Noise Sample The noise sample is what tells Audacity which frequencies to remove and which ones to keep. Use your Selection Tool to highlight a “silent” portion of your audio track, where no one is talking and it’s just the background noise. Then click on the Effect tab on the top of your screen and select “Noise Reduction.” Once you see the pop-up, click “Get Noise Profile.”
2. Apply Noise Reduction Now that you have your unwanted frequencies identified, select the entire track and go to Effect – Noise Reduction once again. Tell Audacity how much you want it to reduce those frequencies by changing the “Noise reduction (dB)” field. When you’re ready, click “OK”
3. Tweak The Settings Often the first time you apply noise reduction it doesn’t turn out exactly the way you wanted it to. Maybe it didn’t reduce the frequencies enough and that lawnmower is still hanging out in the background. Undo the previous noise reduction effect by clicking Ctrl + Z (for Windows) or Cmd + Z (for Mac) and repeat the process from Step 2, only this time change adjust your settings before clicking “OK” again.
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