In the classic "Puffy Shirt" episode of Seinfeld, Jerry accidentally promises "low talker" Leslie to wear her shirt design on The Today Show. Both in this episode and during her appearance in the finale, Leslie speaks so softly that it sounds like she's mumbling, and consequently nobody can understand what she's saying.
Is the actress (Wendel Mendrum) actually speaking her lines that softly, or is she in reality just mumbling nonsense?