I'm wondering about the ultrasonic sonar. I've seen really cool videos where people herd sheep with a drone. It appears that the sheep are afraid of the prop noise and the drone. But I was reading the P3 manual last night and came across this: It seems that the sonar's sound is 40kHZ. My research indicates that the sonar sound is within sheep's hearing range. I can't find any specs on the dB of the sonar, but I'd imagine it would be fairly high. I'm not the animal police or anything, just curious if the sheep might be moving because of the sonar. (Similar as how a dog whistle works on dogs).