Supersound

The most promising industrial application of supersounds lies in what the scientist calls colloid chemistry[…] In the laboratory, supersounds speed up chemical reactions, mix substances that in the past would not join together[…]

Bats use supersounds as a substitute for eyes. When a maze of silk threads was strung across a room, bats negotiated the maze at high speed without touching a thread.

If an unexposed photographic plate is submerged in distilled water, subjected to the action of supersound and then developed, the plate will be found to have darkened as if it had been exposed.