A de-esser is a podcaster’s best friend. It reduces the sibilance (words with “sss” or “shh” sounds, like ship, chip, sip, zip, or jump) of phrases so that they don’t jump out in listeners’ ears. It is literally a de “sss”er. Once you start listening for sibilance, you’ll never be able to unhear it, and I apologize for that, but it is all in an effort to help you make a better podcast!