'Sound of the Trumpet' in the Bible

It shall be that when they make a long blast with the ram’s horn, and when you hear the sound of the trumpet, all the people shall shout with a great shout; and the wall of the city will fall down flat, and the people will go up every man straight ahead.”

So the people shouted, and priests blew the trumpets; and when the people heard the sound of the trumpet, the people shouted with a great shout and the wall fell down flat, so that the people went up into the city, every man straight ahead, and they took the city.