I edit voice recordings for a living. I can't access the file you up loaded as I'm at work and fire-walled. But, I can tell you we use Isotope RX, and the WAVES restoration plug-ins (ParaEQ 10 and L1 & L2) to make voice recordings sound good. A little compression and a DeEsser are also very useful. The pro voice talent can keep their voices at the same level for a good long while, but most people have big fluctuations in the volume as they speak. DeEsser help with sibilance.