Well that was a waste of 2 hours, I don't know how they keep the attention of anybody, I fell asleep about 4 times.
Strangely, the wirelessly powered TVs and monitors have now become the transmitters, although the stick on light bulbs are still a goer.
If 99.999% of the US energy is reflected off skin
how much is reflected of the hard back surface of a phone.
Would that in-car-transmitter have cameras to search for the phones/rectangles, ignoring the fact it would have to see the back of the phone, would it work in the dark.
Pets and 40kHz are mentioned/fluffed around 55:00, she says ~99.9% of the energy is just in the beam, my cat would disagree even at a few mW TX, - don't forget 99.999% gets reflected!
So assuming a transmitter efficiency of 70% and a projected figure of 30% overall, they might be targeting a 42% receiver conversion, before medium comes in (which would drop everything to <1%). Just my spin on the numbers.
Yeah, I still think in any practicable use they'll still be under 1%.