Noise "Removal" isn't always possible - Noise "REDUCTION" is! It can removes electronic hums and low frequency rumbles to make your recordings sound cleaner.
  • If OVERUSED, "Noise Removal" can make your voice sound artificial and overly compressed like a bad Skype phone call.
  • Irregular background voices and noises like chair squeaks cannot be removed - this filter only works with ongoing hums and white noise

Experiment with the steps below and see if you can improve YOUR recordings
Begin by prepping your file:
  1. When you record, try to leave a second or two of silence - you'll actually record the "Room noise" that has the hums and low level rumbles in your environment.
  2. Use FILE - IMPORT to Load your sound file into Audacity
  3. Use EFFECT- NORMALIZE to Amplify and help optimize the signal


Filter Settings
  • Noise Reduction(db): 12
  • Sensitivity: 6.00
  • Frequency smoothing (bands): 0
  • Noise: Reduce (vs Residue)

1. Highlight a sample of "blank" audio - even the quietest part of the waveform is likely to have some "bumps" from background noise
3. Click (Step 1) GET NOISE PROFILE to allow audacity to analyze the "quiet" chunk of your waveform
4. Now highlight the ENTIRE waveform that you want to process
5. Return to EFFECT - NOISE REMOVAL and if need be, adjust the amount of processing you want to try. A good default mix seems to be
  • 24 Noise Reduction
  • 0.00 Sensitivity
  • 150 Frequency smoothing
  • 0.15 Attack/decay

- Click the PREVIEW button and see how it sounds

When you're happy with it, click REMOVE NOISE to complete the effect!