How to prevent echo over the noise reduction

I had a dickens of a time trying to find how to reduce the echo that remains after the removal of the background noise. However, I do not give to the top and after playing with some of the settings, I believe that I thought about it! I use Adobe Audition CC (6.0). You'll want to follow the steps below as a means of noise reduction, not after it. So we prevent the echo over the noise removal, do not get rid of it... if that makes sense. Then, start with your original audio with noise, then...

  1. Perform normal selection of background noise and sampling procedures, it (SHIFT + P)
  2. Select all audio data (CTRL + A).
  3. Prepare to apply the noise reduction: Effects > restoration/noise reduction > noise (process) or CTRL + SHIFT + P
  4. In the window that appears, I played a bit with the three parameters (see image below):
    • (85%) noise reduction slider
    • Reduce by slider (approximately 40 dB)
    • In the "Advanced" section (you may need to click on the small triangle/arrow to decompress), the spectral decomposition rate (10%). It is this final setting that makes a HUGE difference!
  5. Put audio on the loop if it is a small clip and click the play button to hear a sample of the noise reduction applied.
  6. Adjust the three above mentioned settings until you get the desired effect.
  7. Click 'apply '.

I hope that helps!

noise_reduction_remove_echo.PNG

Can I make a suggestion?  Although you're experiences were useful, trying to find a unique size of the entire solution "one pass" probably doesn't give the best results.  Basically, if you hear NR artifacts (the quality that you are referring to) any point you made too much noise reduction only once.

As a general rule, you're better off doing 3 or 4 passes the very slight noise reduction, entering a new sample of noise each time.  For most 'normal' noise, it can also be very useful to increase the size of the FFT (in the Advanced menu) a parameter preset or so before grabbing each of these sequential noise samples.

Tags: Audition

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