Trumpet: Made of Ram's Horn

Have seven priests carry seven rams’ horns in front of the ark. Then on the seventh day, march around the city seven times, while the priests blow the horns. …

After Joshua had spoken to the people, seven priests carrying seven rams’ horns before the LORD advanced and blew the horns, and the ark of the covenant of the LORD followed them.

And the seven priests carrying seven rams’ horns kept marching ahead of the ark of the LORD and blowing the horns. The armed troops went in front of them and the rear guard followed the ark of the LORD, while the horns kept sounding.