This word is used to describe many sounds and noises. It is not always a human voice that is intended.
Exodus 4:8 (a) GOD intended that this sign should carry a message to the hearts of all who observed it. It failed to do so. Pharaoh would not believe.
2 Samuel 22:14 (a) It is quite probable that the thunder was GOD's word of warning concerning His power and His might. (See also Job 40:9; Psalm 46:6; Psalm 77:18; Psalm 104:7).
Psalm 93:3 (a) The power of water, the irresistible waves, and the force of the flood are called the voice of GOD, because they are supposed to bring a warning message to the people of the power of GOD. (See also Jeremiah 10:13; Jeremiah 51:16; Ezekiel 43:2; Revelation 1:15; Revelation 19:6).