The hum is a low-frequency humming or a rumbling sound, like a truck idling, that only 2-5% of the population can hear. Hum ...

Some describe it as sounding like an engine idling just outside the house. Others report hearing a low-frequency rumble. But almost everyone who can hear it—2 percent of the population, by some ...

Islanders in the Outer Hebrides whose lives are being disrupted by a mysterious humming sound say they believe the source is military operations in the North Atlantic. The persistent low frequency ...

For residents in Squamish, the experience of Kitimat locals following the opening of the LNG liquefaction plant there has ...

High in the Andes Mountains of Peru, villagers have long reported a strange, haunting sound that rises during earthquakes — a ...