I have been thinking about HSS – see earlier post. If one could use HSS at a concert venue, very little or no sound would reflect back to the stage which would mean no feedback problems and a much purer sound. It would also mean that concerts could be held in better areas of town because there would be no noise bothering the neighbors. On the other hand I imagine that an HSS apparatus attached to a billboard could project sound at people within view of the board beckoning them to look at the image…like people in swimsuits whispering for the bystander to join them in the Caribbean…