6 When they heard this sound, a crowd came together in bewilderment, because each one heard their own language being spoken.

Read Acts 2:6 Using Other Translations

Now when this was noised abroad, the multitude came together, and were confounded, because that every man heard them speak in his own language.
And at this sound the multitude came together, and they were bewildered, because each one was hearing them speak in his own language.
When they heard the loud noise, everyone came running, and they were bewildered to hear their own languages being spoken by the believers.