To get a good crisp professional sounding audio recording, you must remove the background noise. This noise can come from electric lights, heating and air conditioning units or any other ambient sound. Most audio software will feature a facility for removing this noise without interfering with the quality of the actual recording.
Removing noise
1.
Step 1
Highlight a silent portion of the audio. This image shows a part of the recording that should be silent, which should be shown with a straight horizontal line. Use your cursor to highlight a portion of silence.
2.
Step 2
Get a profile. Select Effects > Noise Reduction > Noise Reduction. Click the button labeled: Get Profile from Selection. This tells the audio software which noise should be removed from the entire recording. Your resulting screen should look like this image.
3.
Step 3
Click the Close button. Be careful not to click the OK button at this point because you have only gotten the profile and you need to run that profile on the entire recording.
4.
Step 4
Highlight the entire audio recording. You will now remove all of the ambient noise. Select Effects > Noise Reduction > Noise Reduction, and then click OK. All of the silent areas within the recording should show a straight line. This means you have removed all of the ambient noise.