The Hum is a persistent and invasive low-frequency humming, rumbling, or droning noise audible to many, but not all, people in an area. Hums have been reported in many countries, including Australia, Canada, the United Kingdom, and the United States.
The Hum is a persistent and invasive low-frequency humming, rumbling, or droning noise audible to many, but not all, people in an area. Hums have been reported in many countries, including Australia, Canada, the United Kingdom, and the United States.
Source: Wikipedia "The Hum" · CC BY-SA 4.0
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