Contradiction with Deuteronomy 4:12
This verse states that God spoke out of the fire, and people heard the voice but saw no form, which contrasts with the thundering sound the people perceived in John 12:29.
Deuteronomy 4:12: And the LORD spake unto you out of the midst of the fire: ye heard the voice of the words, but saw no similitude; only [ye heard] a voice. [only...: Heb. save a voice]
Contradiction with 1 Kings 19:12
This verse describes God speaking in a still small voice, contradicting the idea of a voice or sound of thunder as in John 12:29.
1 Kings 19:12: And after the earthquake a fire; [but] the LORD [was] not in the fire: and after the fire a still small voice.
Contradiction with Exodus 20:18-19
The Israelites heard thunder and preferred not to hear God's voice directly, while in John 12:29, some perceive thunder as an angel speaking.
Exodus 20:18-19: And all the people saw the thunderings, and the lightnings, and the noise of the trumpet, and the mountain smoking: and when the people saw [it], they removed, and stood afar off.
Contradiction with Acts 22:9
Here, the companions of Paul hear the sound but understand nothing, unlike John 12:29, where the crowd assigns meaning to the sound.
Acts 22:9: And they that were with me saw indeed the light, and were afraid; but they heard not the voice of him that spake to me.
Contradiction with Revelation 4:5
This verse describes thunder proceeding from God's throne, differing from the perceived human interactions with the sound in John 12:29.
Revelation 4:5: And out of the throne proceeded lightnings and thunderings and voices: and [there were] seven lamps of fire burning before the throne, which are the seven Spirits of God.