An acoustics expert claims to have found the source of a humming sound that has bothered dozens of Kokomo families for years. Acoustics researcher Jim Cowan has traced low-frequency noises to a fan at the Kokomo Chrysler plant. Around 126 families have complained of nausea, headaches, diarrhea and memory loss -- common reactions to low-frequency noises. "We don't know how long it's going to take for people to feel better if this is the actual source of the thing, but eventually people will feel better if these sounds are causing these things," Cowan said. The factory is trying to get rid of their noisemakers, RTV6 reported. If they can't solve the problem, city leaders will look at possible chemical and electromagnetic solutions.