It mentions investigations many times: "Since reports of it surfaced in 2011, the hum has been studied by the Canadian government, the University of Western On

It mentions investigations many times: "Since reports of it surfaced in 2011, the hum has been studied by the Canadian government, the University of Western Ontario and the University of Windsor." Those are all the links in the article, the last one (https://www.dropbox.com/s/vi8ek3hqiof81ca/UW%20Study%20Report.compressed.pdf https://www.dropbox.com/s/vi8ek3hqiof81ca/UW%20Study%20Repor...) gives us "For the duration of the project, the Hum manifested on only a handful of days, which made the identification of the source difficult. Good data representative of the Hum was measured using the stationed noise monitors. Conclusive evidence of the source was not achieved using the NSI system since the Hum was not present on those days that this equipment was deployed on the river. The conclusion of the research is that the Windsor Hum does exist and has both qualitative and quantitative characteristics that surmise the likely source of the Hum to be from the blast furnace operations on Zug Island." So the main problem of the article is that it tries to make a mystery from something reasonably good investigated.