trumpet

Definition

The term "trumpet" refers to an instrument for producing music or for calling people to gather together for an announcement or meeting.

A trumpet was commonly made of either metal, sea shell, or an animal horn.
Trumpets were most commonly blown to call people to come together for battle, and for Israel's public assemblies.
The book of Revelation describes a scene in the end times in which angels blow their trumpets to signal the outpouring of the wrath of God on the earth.