Hebrews 12:19

and the blast of a trumpet, and an audible voice.' Those who heard that voice entreated that they might hear no more,

1 Corinthians 15:52

At the last trumpet-call; for the trumpet will sound, and the dead will rise immortal, and we, also, shall be transformed.

1 Thessalonians 4:16

For, with a loud summons, with the shout of an archangel, and with the trumpet-call of God, the Lord himself will come down from Heaven.

Treasury of Scripture Knowledge

Summary

And the sound of a trumpet, and the voice of words; which voice they that heard intreated that the word should not be spoken to them any more:

Bible References

The sound

1 Corinthians 15:52
At the last trumpet-call; for the trumpet will sound, and the dead will rise immortal, and we, also, shall be transformed.
1 Thessalonians 4:16
For, with a loud summons, with the shout of an archangel, and with the trumpet-call of God, the Lord himself will come down from Heaven.