December 16th, 2012, 07:54 PM | #4 |
Trustee Location: Miami, FL USA | This is pretty easy to remove with the noise removal tool in almost any audio editing program ---the excellent freeware Audacity is one such (Audacity: Free Audio Editor and Recorder). You sample the noise you want to remove in the first step; then select the clip or portion you want to treat, re-open the noise removal tool, and apply. There are various settings you can experiment with to get the amount of removal that you need without affecting the speech or whatever you want to keep to too great a degree. In these cases, the success depends on the ratio of the level of the noise to the good part, and on the frequency range that you are removing --- whether or not it affects the good part. It takes some tweaking to get a good result in most cases. Attached files are waveform before nr, and wavefrom from Audacity after 24dB noise removal from a sample taken from the middle of the image. Audacity also has a dedicated 'click and pop' removal filter. Sony Sound Forge, Adobe Audition, etc. have similar features. Last edited by Battle Vaughan; December 16th, 2012 at 08:08 PM. Reason: addendum |