Probably the most recorded sound in the world is the human voice. Much of the time a recording is nothing BUT a voice, be it on a commercial, reading you an audio book, etc. That being the case, the better the audio quality the more professional the end-result will be. In a perfect world we’d all be rich and everyone could afford large diaphragm condenser mics and excellent analog-to-digital converters for our home recording studios. But as we know, this is not a perfect world. Most of us will only be able to afford inexpensive gear. That’s fine. The techniques mentioned in this article will enable you to get the best possible quality out of whatever mic you happen to have.
So what makes a good quality voiceover recording? Obviously there is some subjectivity to the issue, but in general the voice should be clear, up-front, easy to understand, have level volume (you can hear the loud parts and the quiet parts without pain or straining, respectively), and is as noise-free as possible.
To get some more details, check out the article on voiceover recording at Home Brew Audio – www.homebrewaudio.co.