For decades, residents of Taos, New Mexico, have reported a mysterious low-frequency humming sound with an unknown origin. Despite scientific research, no source has been identified.
Key Points
Reported since the early 1990s; only about 2–6% of residents can hear it.
Described as a constant engine-like vibration with no identifiable source.
Acoustic, seismic, and electromagnetic surveys have all failed to detect a cause.
Some researchers believe it may be a psychoacoustic phenomenon, while others suspect underground geological resonance.
The hum has also been reported in other parts of the world, including the UK and Canada.