—Donna A., Seymour, Connecticut This is a phenomenon called auditory pareidolia (pare-ih-DOH-lee-uh), in which one hears patterns in random data and interprets them as music or conversation. (A visual form of pareidolia also exists.) Common sources include fans, rushing wind, air conditioners, white-noise generators and the drone onboard a plane in flight. It’s harmless, so try to relax and enjoy the experience. Some people even listen for their favorite music and find it!