A real referee blowing a traditional metal pea whistle used on soccer or any other sport for indicate a foul.
RELATED:
Referee pea whistle pack 01 (include the actual file)
Referee whistles 11-12 (modern, emulated)
Referee whistle 13 modern (not emulated)
Basketball
Balls set
Vuvuzela Style Horn
Football Kicks
Crowd Cheering With Drums