This sound is from General Grievous Sounds: Star Wars

General Grievous was introduced in the 2003 animated series Star Wars Clone Wars. He has appeared in various forms of media in the Star Wars Expanded Universe, including novels, comic books and video games.
See also: Star Wars: Clone Wars (2003 TV series), Clone Wars (Star Wars), Star Wars: Episode III – Revenge of the Sith, List of Star Wars planets and moons, Matthew Wood (sound editor), List of Star Wars: The Clone Wars episodes.