'Trumpet' in the Bible

When he arrived there, he sounded a trumpet in the mountainous region of Ephraim. While the Israeli army accompanied Ehud from the mountainous regions,

So the Spirit of the LORD took control of Gideon, who blew a trumpet, mustering the descendants of Abiezer to follow him into battle.

When I sound my trumpet, accompanied by everyone who is with me, you must blow your trumpets all around the entire encampment. Then shout out, "For the LORD and for Gideon!'"