But you can take even normal audio and blast it loud enough to generate some trivial power in a receiving microphone. Phased-array&#x2F;beam-searing is known technology.
You can google and see that she was doing the PR circuit and making some grandiose statements herself.
You can&#x27;t just tackle a hard problem, take in lots of money, produce nothing and say &quot;oops, technology is hard&quot;. 
And shouldn&#x27;t they have &quot; realize[ed] the actual limitations of what is possible physics wise&quot; before they took the money and started the engineering?
Getting 90% of the way to the finish line, but getting beaten there by a competitor is a normal business failure. Getting 0% of the way there, but putting out lots of PR is a con job.