How to make audio "internal editing" in a movie? I've just read an old blog post about "internal editing", a special kind of audio post processing of recorded interviews. It basically consists of removing the unnecessary interjections, like the "ums" and "ehs" that we normally say while speaking. It improves the rhythm of conversations, and make your interviewee look more intelligent. 

If you just have audio, it is simple. You crop out the interjections. But if you have an interview recorded in somewhere with background noise, if you delete the interjections, there will be an weird silence. Deleting it, would unsync the audio and image. 

Would someone give me some tips to remove just the voice using an audio editor? A step by step guide would be great.
Instead of deleting the offending bit, overwrite it with room tone, a section of nominal silence either recorded specifically for this purpose at the time of filming, or just taken from a nearby bit of silence.