The sound is detectable to people in Windsor, which lies on Canada's border with the United States. But Americans across the river can't hear it:
Windsor residents have blamed the hum for causing illness, whipping dogs into frenzies, keeping cats housebound and sending goldfish to the surface in backyard ponds. Many have resorted to switching on their furnace fan all season to drown out the noise.
Even weirder, Americans can't seem to hear it. Canadians find that suspicious—especially since their research suggests the hum is coming from the Yankees' side—and accuse U.S. officials of staying silent over the noise. [...]
American officials contend there haven't been complaints on the U.S. side of the border. Michigan's Department of Environmental Quality looked last year at whether the companies at Zug started up any new machinery in the past two years that might be causing the noise and found nothing.
"The only place I am hearing noise from is Canada—from politicians complaining," Mr. Bowdler said.
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