Keep in mind that you should not be speaking directly face-on into the mic; the mic should be at a 20 to 45 degree angle, depending upon the voice and the mic technique of the speaker. Alcove was referring to the angle, you do not want to speak head on into the mic. I would say 1 -2 fists ( 3-6″ ) away should work. The air from your mouth going straight into the mic increase the pickup of plosives….The pop filter suggested is universal.
Using a pop filter for the first time may be discouraging. If you don’t pay close attention to how your microphone sounds, you’re probably going to miss it. A pop filter will not get rid of every little pop or hard sound. Also, I should take the time to note that a pop filter is not the same thing as a windscreen. They are two separate things performing two separate jobs. A windscreen will not work as a pop filter. A pop filter performs the task of reducing the amount of hard air (or “puffs”) created from your breath from reaching the microphone. That’s it. Puffs can create distortion and make your take sound absolutely nasty. A pop filter doesn’t magically get rid of hard ‘p’ sounds. It will help slightly with hard ‘p’ sounds, however this is not its overall goal. Hard ‘p’ sounds are natural. When you say “peter piper picked a peck of pickled peppers”, the way you position your lips causes the air to “puff” out harder than normal. It’s like this for a lot of sounds that we make. A properly trained voice actor will be able to limit the ‘hardness’ of the ‘p’, ‘d’, ‘b’, and other sounds using proper breathing, etc.