If it uses near-ultrasonic chirps, shouldn't it be called 'painfully loud net'?
A lot of common things, from fluorescent lights, to car brakes, to computers, to incapacitating safety systems, can hurt people with sensory sensitivities. I'm sick of being in agony because someone thought bright lights were better, flashing lights were an important safety feature, high-pitched beeps were better, and 'near-ultrasound' squeals wouldn't bother anyone, let alone incapacitate someone across from the construction site, in too much pain to stand up let alone walk away from the beeps and the squeals.
So this sounds like another example of either ignoring or hating people with sensory sensitivities.
I know that it could be quiet for some people, but not for the rest of us. I had to bring an old computer in for repairs because of painfully loud processor noise. A few days later, they called to say it was repaired. I came to the repair place and it had the same painfully loud processor noise. After asking, it turned out that the repair guy couldn't hear the problem so decided there was no problem. I then sent the old computer back to the manufacturer for repairs. A few weeks later, I got the call that it had been repaired. I came to the repair place and it still had the same painfully loud processor noise. After someone checked it out with an audiometer, I was able to turn it in, but I have had ergo and noise problems with the new one...