Why and how did the JU-87 Stuka make such a sound?

The unmistakable sound of the Junkers Ju 87 “Stuka” dive bomber — one of the most iconic and feared aircraft of World War II. Its wailing siren, the Jericho-Trompete, was deliberately fitted to its landing gear to amplify psychological terror during steep dive attacks. First entering service in 1937, the Ju 87 proved devastating in early Blitzkrieg campaigns across Poland, France, and the Low Countries. But as the war progressed, its slow speed and vulnerability to modern fighters made it increa