Do you know what the word Teruah means?
It means a loud shout of joy, a shout of warning/alarm, and blowing [of a trumpet]. The text, in Hebrew, can mean one of those three things.
I observe the three feasts and seven holy days of Torah. Yom Teruah is one of the seven holy days. It is at the beggining of the seventh month, so it is also Rosh Chodesh, the Head of the Month.
I did not say that Yom Teruah was not a feast of the Lord given to Israel. What I said is that one does not know if a trumpet was blown or if a loud shout was given, because the text does not say so. In other words, it is only opinion. There is no other verse in the OT that shows Yom Teruah was a blowing of trumpets.
There are many verses showing that teruah means a loud shout:
1Sa 4:5
And when the ark of the covenant of the LORD came into the camp, all Israel shouted with a great shout [teruah], so that the earth rang again.
1Ch 15:28
Thus all Israel brought up the ark of the covenant of the LORD with shouting [teruah], and with sound [teruah] of the cornet, and with trumpets, and with cymbals, making a noise with psalteries and harps.
2 Ch 15:14
And they sware unto the LORD with a loud voice, and with shouting [teruah], and with trumpets, and with cornets.
Ezr 3
11 And they sang together by course in praising and giving thanks unto the LORD; because he is good, for his mercy endureth for ever toward Israel. And all the people shouted with a great shout [teruah], when they praised the LORD, because the foundation of the house of the LORD was laid.
12 But many of the priests and Levites and chief of the fathers, who were ancient men, that had seen the first house, when the foundation of this house was laid before their eyes, wept with a loud voice; and many shouted [teruah] aloud for joy:
13 So that the people could not discern the noise of the shout [teruah] of joy from the noise of the weeping of the people: for the people shouted with a loud shout [teruah], and the noise was heard afar off.
Job 8:21
Till he fill thy mouth with laughing, and thy lips with rejoicing [teruah].
Job 33:26
He shall pray unto God, and he will be favourable unto him: and he shall see his face with joy [teruah]: for he will render unto man his righteousness.
Job 39:25
He saith among the trumpets, Ha, ha; and he smelleth the battle afar off, the thunder of the captains, and the shouting [teruah].
Ps 27:6
And now shall mine head be lifted up above mine enemies round about me: therefore willI offer in his tabernacle sacrifices of joy [teruah];I will sing, yea,I will sing praises unto the LORD.