You might be able to beam form a bit more efficiency, however one thing you can't escape is the angle at which the receiver is pointing. All microphones have p

You might be able to beam form a bit more efficiency, however one thing you can't escape is the angle at which the receiver is pointing. All microphones have polar patterns. There are areas that are more sensistive, areas that are less. So not only does it need line of sight, it'll need to be pointing at transmitter. It's also interesting to note that we've had wireless charging for at least 5 years, but none of them yet are long distance. they are all mats that you put the device on.