#19 those were used by the germans, not by american planes like the one in the GIF. Also, the Jericho trumpets were devices mounted on bombs. Those mounted on planes were called 'Lärmgeräte', noise devices
"The iconic ‘scream’ made by WW2 dive bombers is produced by two separate acoustic devices mounted to the wings, known as a ‘Jericho Trumpet(s)’ and serve no purpose beyond intimidation."
#19 those were used by the germans, not by american planes like the one in the GIF. Also, the Jericho trumpets were devices mounted on bombs. Those mounted on planes were called 'Lärmgeräte', noise devices