Revelation 1:10
I was in the Spirit on the Lord's day, and heard a great voice behind me, as of a trumpet,
Revelation 1:15
and his feet like fine brass, when glowing in a furnace; and his voice as the voice of many waters;
Revelation 5:11-14
And I beheld, and heard the voice of many angels round about the throne, and of the living creatures, and of the elders: and the number of them was myriads of myriads, and thousands of thousands;
Revelation 19:6
And I heard a sound, which was as the voice of a great multitude, and as the voice of many waters, and like the peal of mighty thunderings, saying, Hallelujah! for the Lord God, the Omnipotent, reigns!