What you are hearing are "'plosives", breath noises picked up by the mic, 'specially the H, TH, D, B, P sounds. Try speaking at an angle to the mic, the volume will have to be increased a bit, the volume of your files was a bit on the low side.
Please experiment a bit with mic placement and volume levels. You may also want to try a POP filter - a wind screen to catch the breath before it hits the mic.
Your readings were all PL OK, it is up to you if you want to redo them.