The crowd of bystanders heard the sound and said that it had thundered; others said, An angel has spoken to Him!
John 12:28-29


On the Damascus road only Saul heard the voice. “Those that travelled with him only heard the sound … Acts 9:7


Daniel 10:7
And I, Daniel, alone saw the vision [of this heavenly being], for the men who were with me did not see the vision, but a great trembling fell upon them so that they fled to hide themselves.

What do these statements have in common?
One thing is that not everyone hears and understands the Voice of God.