This Instructable (my first) will show you how to add an external mic jack so you can plug a lapel or headset mic into the EyeToy camera (and many other webcams) to be heard more clearly.
If you have an EyeToy and still haven't installed it on your computer, see this instructable Turn-a-PS2-EyeToy-Camera-into-a-High-Quality-Webcam.
Step 1: Gather the supplies.
EyeToy (or other webcam with built-in mic)
Miniature mic cable
1/8" (3.5mm) switched phone jack (I used stereo)
Soldering iron with fine tip
Knife (you might need to trim the plastic)