'Trumpet' in the Bible

On the third day, when morning came, there was thunder and lightning, a thick cloud on the mountain, and a loud trumpet sound, so that all the people in the camp shuddered.

As the sound of the trumpet grew louder and louder, Moses spoke and God answered him in the thunder.

All the people witnessed the thunder and lightning, the sound of the trumpet, and the mountain surrounded by smoke. When the people saw it they trembled and stood at a distance.