So I've been frequently listening to Australian accents on the media, different series which all have Australian characters such as Chase from "House M.D" or Stella from "Orange is The New Black". I can see they're clearly different from Standart American but it seems hard to me to differ it from RP or British-related ones. However the American characters on these series always seem to notice very fast that the speaker is Australian.

Could someone explain (or maybe even refer to any good multimedia content) a little about the specific characteristics of the Australian accent? Preferably in a way that doesn't look like the wikipedia-linguistic expert-focused explanation.

Thank you very much for your time.