===================================================================================
Another possibility relates to language, and the poor situational translation of Greek words into English.
===================================================================================
As an example within the English language, what does the verb “run” mean?
We can run, we can run a race, we can run a company, we can run up a bill, and we can run other people down by reputation and we can run people down in a car.
===================================================================================
The Greek word akouo has a range of meanings. They include: to hear (as in a sound); and to understand something that has been said.
In Acts 9:7, the people heard a sound that was like a human voice, but were puzzled because they could not determine its source.
In Acts 22:9, Paul is saying that only he understood what the voice that everyone heard, was saying.
(The link in Post #3 is helpful.)
===================================================================================
Solving apparent problems becomes relatively easy if one downloads something like the superb, free TheWord Bible program, and say, the Mickelson’s (updated Strong’s) and BDB/Thayer dictionaries (lexicons).
Why not give it a go?
===================================================================================