This sound is from Engineer Sounds: Team Fortress 2

Team Fortress 2 is a 2007 multiplayer first-person shooter game developed and published by Valve Corporation. It is the sequel to the 1996 Team Fortress mod for Quake and its 1999 remake, Team Fortress Classic.
See also: Engineer (disambiguation), Team Fortress Classic, List of fictional scientists and engineers, Kent Fortress Royal Engineers, Grant Goodeve, Kabaneri of the Iron Fortress.