They range from electrical noise, pumps, industrial machinery, and so on. He added: “While it must be stressed time and again that there are many sounds created by human activity that can sound like the Hum, and it takes some effort and knowledge to track those sounds down. While there was debate about whether the hum is in fact tinnitus, Glen MacPherson, a mathematics, physics, psychology, and Russian Language teacher and former Mathematics Education lecturer at the University of British Columbia (UBC), who has been investigating the Hum’s source, said: “As several posters mentioned, classic tinnitus is profoundly different from the Worldwide Hum.” This week readers proposed theories about what the mysterious worldwide hum is and several, more sceptical readers, cast doubt on the idea that it exists at all. A study later confirmed it was likely to be coming from a US Steel plant’s blast furnace operations on nearby Zug island. In 2016 residents in the Canadian city of Windsor were plagued by a puzzling noise. It’s not the first time a hum has hit the headlines.
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