Kokomo hum mystery solved

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Kokomo, May 25 - An acoustics expert says a mysterious hum in Kokomo is almost gone.

The city hired the consultant to track down the source of the low-frequency noise that is blamed for making residents sick. He found that some of the noise came from a cooling fan on the roof of Daimler Chrysler's Kokomo Casting Plant.

He traced a similar tone coming from three air compressor units at Haynes International.

Officials at both companies made adjustments to bring down the noise levels.