This is an excellent article. That said, holy shit those are going to be loud. The Wing drone hovers at 24 feet while it lowers its payload? The others desce

This is an excellent article. That said, holy shit those are going to be loud. The Wing drone hovers at 24 feet while it lowers its payload? The others descend entirely to the ground? They're typically going to hover just a few hundred feet above the ground? If these are roughly as loud as the quietest DJI drones (and I suspect they will be louder as they are heavier and have larger payloads), they are going to be incessantly annoying.