Both mammals have a sophisticated sensing mechanism but how could that be in the evolutionary framework when both these animals grew up in completely different environments with different lineages and are vastly different in size. At the University at Southern Denmark, they write…

“Sperm whales weigh up to 50 tons, and the smallest bat barely reaches a gram. Nevertheless, the two species share the same success story: They both have developed the ability to use echolocation – a biological sonar – for hunting. Now Danish researchers show that the biosonar of toothed whales and bats share surprisingly many similarities – even though they live in very different environments and vary extremely in size.”

“Researchers from the two Danish universities, Aarhus University and University of Southern Denmark, have now studied the acoustic properties of the technique behind echolocation in bats and whales in the wild. Previous studies of their abilities to locate and catch prey have primarily been based on laboratory tests, and the studies in the wild now provide a much more realistic picture of how the animals use echolocation.”

What happens when evolution gets falsified in this manner, you invoke “convergent evolution” even though as it says in current biology…“the exact evolutionary relationship of bats to their closest mammalian relatives is poorly understood due to their unique morphological features associated with flight, a lack of intermediate forms, and a poor fossil record.”