block detector with new echo shards

I was thinking of another way to use the new echo shards and I think a block detector is a good fit. If you don't know, string theory is about how everything is made up of vibrating strings. So what if there was a block that detected the vibration? Skulk sensors and the warden detect vibrations as well, so it would fit in with lore. It would also be great for hardcore players. How it would work is you put the sensor down, put the block you want the sensor to detect, and put a repeater coming out. It's simple, and can have lots of uses within different farms.