Since the early 1990s, residents in and around Taos, New Mexico, have reported hearing a persistent low-frequency sound with no visible or measurable source. The sound is described as external, ...

Up to 4% of people are said to hear a strange low-pitched noise known as the Hum, but no source has ever been found. City life is one possible cause “Whenever I wake up it is there and it is ...

Sue Taylor first started hearing it at night in 2009. A retired psychiatric nurse, Taylor lives in Roslin, Scotland, a small village seven miles outside of Edinburgh. “A thick, low hum,” is how she ...