I think I'm going to include this as part of my 1000th video
Running back of envelope calcs:
Assuming absolutely no losses in the transducers, temperature, humidity, air pressure/altitude, no non-linear effects or pressure saturation, no tilt on the phone etc.
Best case you are going to get half your power lost every meter off the bat.
And based on their practical demo video (50sec mark onwards) maybe only 25% of that energy at best would be received in an iPhone sized receiver due to the large side lobe losses that are obvious in their LED panel demo.
So right there you are down to 12.5% efficiency IDEAL BEST CASE at 1m.
That’s 6.25% at 2m, 3% at 3m, and 1.5% at their claimed 4m BEST CASE!
So at 145-155dB (316W/sqm - 3000W/sqm) or 0.03W/sqcm - 0.3W/sqcm
iPhone at 100sqcm assuming best case circular packing density
@1m 3W - 30W * 12.5% eff = 0.75W to 7.5W
@2m 3W - 30W * 6.25% eff = 0.18W to 1.8W
@3m 3W - 30W * 3.125% eff = 0.09W to 0.9W
@4m 3W - 30W * 1.56% eff = 0.04W to 0.4W
Once again all
best case with
zero losses apart from distance and what their own hardware lobes are showing.
We'll stop at 4m because that is their claimed distance.
Obviously if you tilt the phone or use it in any practical real world usage, it just drops to impractical levels at only 2m (approx ceiling height)
And that's not taking into account cost of this boondoggle of a system.
And of course that doesn't include the fact that the recommended safety limits are only 110-115dB in most countries. They want to use up to 155dB
It's a complete dead duck.