Sound is an element that is often ignored in video production and it's certainly just as important as good quality footage. Your audience may forgive a less than perfect image but they won't forgive bad sound. If you can't hear them then you won't know what they are talking about. During an interview most of the information comes from the sound, so without the audio, it is unlikely your message is going to get across.
Here is how audio can enhance any video. This is the Sullivan Logo without sound and then with a few sounds. Sound just makes video a lot more fun to watch.
