Exoplanets and Fermi paradox: can we ever get an answer from other civilizations?

Thoughts about wormholes and hypothetical engines.  Acoustic and electromagnetic systems can create acoustic or electromagnetic channels through air or water. The system can create an acoustic beam or laser beam, that pushes air molecules out of the aircraft's way. That makes the air thinner. And that allows the aircraft to move faster than usual.  An interesting way to raise objects silently up from the ground is to use the tornado that formed above the craft. There is a hatch under the craft and then the system creates an artificial tornado above the craft. Then the craft closes the hatch, and the tornado above the craft pulls it up. The system requires a hatch that can feed rising tornado using air.  The hatch allows it to rise that tornado high enough, that it can pull objects up. The hatch can also used for the acoustic tractor beam. The acoustic tractor beam is the tornado that pulls objects up from the ground. The horizontal tornado makes the craft move faster or it removes