4 Bible Verses about Trumpets For Signalling

I was in the Spirit on the Lord's day, and I heard a loud voice behind me, like a trumpet,

After this, in my vision, I saw a door opened in heaven! And the first voice that I heard speaking with me was like a trumpet, saying, "Come up hither, and I will show you the things that must come to pass hereafter."

"And whatever you give alms, do not sound a trumpet before you as the hypocrites do in the synagogues and streets, in order that men may praise them. In solemn truth I tell you they already have their reward in full.

nor to gloom and darkness and tempest and the blare of a trumpet and an audible voice. Those who heard that voice entreated that no word more should be spoken to them.