New sounds arrive with the changing seasons — migrating birds in the spring, cicadas in the summer, and leaf blowers in the fall. Kentuckiana Sounds curator Aaron Rosenblum picked up the sound of two leaf blowers working simultaneously in Central Park and heard an unusual example of a common psychoacoustic phenomenon. To hear the full recording, explore the sound map, or submit a sound visit www.wfpl.org/sounds or www.kentuckianasounds.org.