Psaltery.
The principal word used is nebel, and it is supposed to refer to some unknown form of stringed instrument used to accompany the voice. It is at times mentioned along with the harp. 1 Samuel 10:5; Psalms 33:2; Psalms 144:9; Psalms 150:3; etc. The same word is also translated VIOL in Isaiah 5:12; Isaiah 14:11; Amos 5:23; Amos 6:5. In Daniel 3:5-15 the word is pesanterin.