I want to put a small Arduino and some sensors inside a tennis ball to measure the ball's height above the ground. It won't be used for tennis, just for fun.
Is there any sensing solution that would allow for the accurate distance detection of the ground through the rubber? Any sort of time-of-flight IR would get absorbed by the rubber that's that thick. I believe sonar would too? My best bet may be using an accelerometer to estimate distance, then determining the height from that.