'Trumpet' in the Bible

All you inhabitants of the world, and you dwellers on the earth, when a banner is lifted up on the mountains, look! When the trumpet is blown, listen!

It will happen in that day that a great trumpet will be blown; and those who were ready to perish in the land of Assyria, and those who were outcasts in the land of Egypt, shall come; and they will worship Yahweh in the holy mountain at Jerusalem.

"Cry aloud, don't spare, lift up your voice like a trumpet, and declare to my people their disobedience, and to the house of Jacob their sins.