Throughout the Bible, trumpets were used to announce something of great importance. Sometimes the sound of the trumpet was used to call the people together to hear directions from God, or to come before the Lord for a holy convocation. At other times it was to warn the people of danger and prepare them for battle against the approach of an enemy. In every case when the trumpets were used, it was of utmost importance that the people hear and understand the trumpets, and obey.