Strong's #5456: phone (pronounced fo-nay')
 probably akin to 5316 through the idea of disclosure; a tone (articulate, bestial or artificial); by implication, an address (for any purpose), saying or language:--noise, sound, voice.
Thayer's Greek Lexicon:
 ́ 
 
  phōnē 
 
 1) a sound, a tone
 
 1a) of inanimate things, as musical instruments
 
 2) a voice
 
 2a) of the sound of uttered words
 
 3) speech
 
 3a) of a language, tongue
 
  Part of Speech: noun feminine
Relation: probably akin to G5316 through the idea of disclosure
  Citing in TDNT: 9:278, 1287
 
Usage:
This word is used 142 times:
Revelation 6:10: "And they cried with a loud  voice, saying, How long, O Lord,"
Revelation 7:2: "God: and he cried with a loud  voice to the four angels,"
Revelation 7:10: "And cried with a loud  voice, saying, Salvation to our God"
Revelation 8:5: "earth: and there were  voices, and thunderings, and lightnings,"
Revelation 8:13: "the midst of heaven, saying with a loud  voice, Woe, woe, woe, to the"
Revelation 8:13: "by reason of the other  voices of the trumpet of the three"
Revelation 9:9: "of iron; and the  sound of their wings was as the sound"
Revelation 9:9: "of their wings was as  the sound of chariots of many horses running"
Revelation 9:13: "and I heard a  voice from the four horns"
Revelation 10:3: "And cried with a loud  voice, as when a lion roareth: and"
Revelation 10:3: "thunders uttered their  voices."
Revelation 10:4: "thunders had uttered their  voices, I was about to write: and I heard"
Revelation 10:4: "to write: and I heard  a voice from heaven saying unto me,"
Revelation 10:7: "the days of the  voice of the seventh angel, when"
Revelation 10:8: "And the  voice which I heard from heaven spake"
Revelation 11:12: "And they heard a great  voice from heaven saying unto them,"
Revelation 11:15: "and there were great  voices in heaven, saying, The"
Revelation 11:19: "there were lightnings, and  voices, and thunderings, and an earthquake,"
Revelation 12:10: "And I heard a loud  voice saying in heaven, Now"
Revelation 14:2: "And I heard  a voice from heaven, as the voice of many"
Revelation 14:2: "from heaven, as  the voice of many waters, and as"
Revelation 14:2: "waters, and as  the voice of a great thunder: and I heard"
Revelation 14:2: "thunder: and I heard  the voice of harpers harping with their"
Revelation 14:7: "Saying with a loud  voice, Fear God, and give"
Revelation 14:9: "saying with a loud  voice, If any man worship the beast"
Revelation 14:13: "And I heard  a voice from heaven saying unto me, Write,"
Revelation 14:15: "crying with a loud  voice to him that sat on the cloud,"
Revelation 16:1: "And I heard a great  voice out of the temple saying"
Revelation 16:17: "and there came a great  voice out of the temple of heaven,"
Revelation 16:18: "And there were  voices, and thunders, and lightnings; and"
Revelation 18:2: "he cried mightily with a strong  voice, saying, Babylon the"
Revelation 18:4: "And I heard another  voice from heaven, saying, Come"
Revelation 18:22: "And  the voice of harpers, and musicians, and of pipers, and"
Revelation 18:22: "any more in thee; and  the sound of a millstone shall be heard"
Revelation 18:23: "no more at all in thee; and  the voice of the bridegroom and of the bride"
Revelation 19:1: "these things I heard a great  voice of much people in heaven,"
Revelation 19:5: "And  a voice came out of the throne, saying, Praise"
Revelation 19:6: "And I heard as it were  the voice of a great multitude, and as"
Revelation 19:6: "multitude, and as  the voice of many waters, and as"
Revelation 19:6: "waters, and as  the voice of mighty thunderings, saying, Alleluia:"
Revelation 19:17: "and he cried with a loud  voice, saying to all the fowls"
Revelation 21:3: "And I heard a great  voice out of heaven saying, Behold,"