Experts aren't positive why some people hear a humming noise that never ceases. However, new research may offer an explanation for the sound, which inspired the show "The Listeners."
Imagine spending your life listening to a low humming sound that never stops and that no one else can hear.
That’s the reality for thousands of people who report hearing a sound sometimes labeled the “global hum” or the “world hum.” But what is this ... [5765 chars]