The Martinshorn is the traditional two tone siren used by police and other emergency services in Germany, named after the company that originally made the horns. Field recordings of the wailing siren, like this one credited to salamisound, have circulated online as stock effects for videos and games. It is often used alongside a danger alarm sound effect or an FBI open up joke when creators want instant authority. Its familiar European tone sets it apart from American sirens and keeps it popular for edits and memes.