ChristianAnswers.Net WebBible Encyclopedia
Hebrew: shophar. Meaning: Brightness, with reference to the clearness of its sound.
It is usually translated in the King James Version as “trumpet.” It denotes the long and straight horn, about eighteen inches long [45.72 centimeters]. The words of Joel, “Blow the trumpet,” literally, “Sound the cornet,” refer to the festival which was the preparation for the day of Atonement.
The word “cornet” in 2 Samuel 6:5 (Hebrew: mena'an'im, occurring only here) was some kind of instrument played by being shaken like the Egyptian sistrum, consisting of rings or bells hung loosely on iron rods.