Removing Noise:

1. Load the sound into the Audition.

2. Zoom in and find a section with the noise by itself and select the frequency associated with the noise.

3. from the menu bar open restoration > Noise Reduction..

4. Click on the capture profile button to generate a noise profile from selection then click on close.

5. By right clicking on the wave select the entire wave.

6. Go to restoration > Noise reduction and apply the filter to entire wave.

7. Try to adjust the Noise reduction level." If reduced the amount of the noise the most, it would have

affected the main signal as well."

8. click ok to render.

9. ... and here is the result.