This sound is from Elfen Lied Soundboard

The anime series has been licensed in North America by ADV Films and in Australia by Madman Entertainment. The anime series revolves around the interactions, views, emotions, and differences between human beings and the Diclonii, a mutant species similar to humans in build but distinguishable by two horns on their heads.
See also: List of Elfen Lied characters, List of Elfen Lied episodes, List of Elfen Lied chapters, Elfenlied, Lynn Okamoto, and Seinen manga.