Frank Welker is an American voice actor who is responsible for a broad spectrum of character voices, noises, and other vocal effects that have appeared over the last 40 years in American TV shows and movies.
Welker is particularly noted for a wide range of non-verbal vocal effects, i.e., for aliens and (non-talking) animals.
He has provided voices on more than 500 productions, including Scooby-Doo, Where Are You!; The New Tom & Jerry Show; The Berenstain Bears; Dungeons & Dragons; G.I. Joe; Transformers; DuckTales; Alvin & the Chipmunks; Tiny Toon Adventures; Animaniacs; Pinky and the Brain; Buzz Lightyear of Star Command; The Simpsons; Johnny Bravo; Futurama; What's New, Scooby-Doo?; Codename: Kids Next Door; and The Grim Adventures of Billy & Mandy.