Hebrews 12:19

to the blare of a trumpet and to a Voice whose words made those who heard it refuse to hear another syllable

1 Thessalonians 4:16

The Lord himself will descend from heaven with a loud summons, when the archangel calls and the trumpet of God sounds; the dead in Christ will rise first;

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 Thessalonians 4:16
The Lord himself will descend from heaven with a loud summons, when the archangel calls and the trumpet of God sounds; the dead in Christ will rise first;