Whatever He may use these days, I’m sure that if He intended us to get a message, we’d get the message...
It seems that not everyone hears the sound - or at least they are not concerned about it and don’t stop to look, etc. So it seems that only certain people hear the sound. So perhaps only certain people are getting the message? (Like the prophets? Of course then there was no missunderstanding that it was God talking and not just Him tuning His bass guitar!)
That said - how come they can get it on a cam-corder then? And I know I’m naive - but I do lend more credence to freepers’ comments of hearing it more than a youtube video. And there are some news accounts of the phenomena that would tend to back up some of the reports. (The one from Vancouver, Canada was interesting).