'Trumpet' in the Bible

All you inhabitants of the world, you who live on the earth, when a banner is raised on the mountains, you'll see it. When a trumpet sounds, you'll hear it!

Furthermore, at that time, a great trumpet will be sounded, and those who were perishing in the land of Assyria and those who had been expelled to the land of Egypt will come and worship the LORD on his holy mountain at Jerusalem.

"Shout aloud! Don't hold back! Lift up your voice like a trumpet! Declare to my people their rebellions, and to the house of Jacob their sins.