All over the world for decades now, people have reported a very strange “humming” noise that doesn’t seem to have an identifiable origin.
To some, it’s a nuisance. To many others, it’s unnerving and maddening. Even more interesting: most people can’t hear it.
The humming appears all over the world. Most notably, Bristol in southern England and Toas, New Mexico play host to the strange humming sound. And strangely enough, only about 2% of the human population is able to hear it.
Often times, the hum is heard indoors and is clearer at night. The hum isn’t common in urban areas, like crowded cities that have constant background noise.
It tends to appear only in more rural, quieter areas. What could it be?
According to one study, the majority of people who can hear the sound are between 55 and 70. Some hear the humming all day, while for others, it’s on and off.