In ancient times the trumpet was long and made of metal. It was used to call the people to assembly as well as an instrument of praise.
The Bible mentions a lot regarding the "Trumpet"
Psalms 150:3 - Praise him with the sound of the trumpet: praise him with the psaltery and harp.
Amos 3:6 - Shall a trumpet be blown in the city, and the people not be afraid? shall there be evil in a city, and the LORD hath not done [it]?
Joshua 6:20 - So the people shouted when [the priests] blew with the trumpets: and it came to pass, when the people heard the sound of the trumpet, and the people shouted with a great shout, that the wall fell down flat, so that the people went up into the city, every man straight before him, and they took the city.
Joshua 6:5 - And it shall come to pass, that when they make a long [blast] with the ram's horn, [and] when ye hear the sound of the trumpet, all the people shall shout with a great shout; and the wall of the city shall fall down flat, and the people shall ascend up every man straight before him.
Jeremiah 4:19 - My bowels, my bowels! I am pained at my very heart; my heart maketh a noise in me; I cannot hold my peace, because thou hast heard, O my soul, the sound of the trumpet, the alarm of war.
Exodus 19:19 - And when the voice of the trumpet sounded long, and waxed louder and louder, Moses spake, and God answered him by a voice.
2 Samuel 18:16 - And Joab blew the trumpet, and the people returned from pursuing after Israel: for Joab held back the people.
2 Samuel 20:22 - Then the woman went unto all the people in her wisdom. And they cut off the head of Sheba the son of Bichri, and cast [it] out to Joab. And he blew a trumpet, and they retired from the city, every man to his tent. And Joab returned to Jerusalem unto the king.
Jeremiah 51:27 - Set ye up a standard in the land, blow the trumpet among the nations, prepare the nations against her, call together against her the kingdoms of Ararat, Minni, and Ashchenaz; appoint a captain against her; cause the horses to come up as the rough caterpillers.
Jeremiah 6:17 - Also I set watchmen over you, [saying], Hearken to the sound of the trumpet. But they said, We will not hearken.
Isaiah 27:13 - And it shall come to pass in that day, [that] the great trumpet shall be blown, and they shall come which were ready to perish in the land of Assyria, and the outcasts in the land of Egypt, and shall worship the LORD in the holy mount at Jerusalem.
1 Samuel 13:3 - And Jonathan smote the garrison of the Philistines that [was] in Geba, and the Philistines heard [of it]. And Saul blew the trumpet throughout all the land, saying, Let the Hebrews hear.
1 Kings 1:41 - And Adonijah and all the guests that [were] with him heard [it] as they had made an end of eating. And when Joab heard the sound of the trumpet, he said, Wherefore [is this] noise of the city being in an uproar?
Ezekiel 33:6 - But if the watchman see the sword come, and blow not the trumpet, and the people be not warned; if the sword come, and take [any] person from among them, he is taken away in his iniquity; but his blood will I require at the watchman's hand.
1 Kings 1:34 - And let Zadok the priest and Nathan the prophet anoint him there king over Israel: and blow ye with the trumpet, and say, God save king Solomon.
1 Kings 1:39 - And Zadok the priest took an horn of oil out of the tabernacle, and anointed Solomon. And they blew the trumpet; and all the people said, God save king Solomon.
Jeremiah 6:1 - O ye children of Benjamin, gather yourselves to flee out of the midst of Jerusalem, and blow the trumpet in Tekoa, and set up a sign of fire in Bethhaccerem: for evil appeareth out of the north, and great destruction.
Exodus 20:18 - And all the people saw the thunderings, and the lightnings, and the noise of the trumpet, and the mountain smoking: and when the people saw [it], they removed, and stood afar off.
Amos 2:2 - But I will send a fire upon Moab, and it shall devour the palaces of Kerioth: and Moab shall die with tumult, with shouting, [and] with the sound of the trumpet:
Judges 7:16 - And he divided the three hundred men [into] three companies, and he put a trumpet in every man's hand, with empty pitchers, and lamps within the pitchers.
2 Samuel 15:10 - But Absalom sent spies throughout all the tribes of Israel, saying, As soon as ye hear the sound of the trumpet, then ye shall say, Absalom reigneth in Hebron.
Zechariah 9:14 - And the LORD shall be seen over them, and his arrow shall go forth as the lightning: and the Lord GOD shall blow the trumpet, and shall go with whirlwinds of the south.
Judges 7:18 - When I blow with a trumpet, I and all that [are] with me, then blow ye the trumpets also on every side of all the camp, and say, [The sword] of the LORD, and of Gideon.
Ezekiel 33:5 - He heard the sound of the trumpet, and took not warning; his blood shall be upon him. But he that taketh warning shall deliver his soul.
Hebrews 12:19 - And the sound of a trumpet, and the voice of words; which [voice] they that heard intreated that the word should not be spoken to them any more:
Revelation 8:13 - And I beheld, and heard an angel flying through the midst of heaven, saying with a loud voice, Woe, woe, woe, to the inhabiters of the earth by reason of the other voices of the trumpet of the three angels, which are yet to sound!
Exodus 19:16 - And it came to pass on the third day in the morning, that there were thunders and lightnings, and a thick cloud upon the mount, and the voice of the trumpet exceeding loud; so that all the people that [was] in the camp trembled.
Joel 2:1 - Blow ye the trumpet in Zion, and sound an alarm in my holy mountain: let all the inhabitants of the land tremble: for the day of the LORD cometh, for [it is] nigh at hand;
2 Samuel 20:1 - And there happened to be there a man of Belial, whose name [was] Sheba, the son of Bichri, a Benjamite: and he blew a trumpet, and said, We have no part in David, neither have we inheritance in the son of Jesse: every man to his tents, O Israel.
Matthew 6:2 - Therefore when thou doest [thine] alms, do not sound a trumpet before thee, as the hypocrites do in the synagogues and in the streets, that they may have glory of men. Verily I say unto you, They have their reward.