In 2012, a strange noise echoed through the woods—and no one has ever figured out what caused it. The sound was deep, ...

The sounds of nature can be incredibly soothing — just think of those zen meditation tracks filled with chirping birds amid the gentle babbling of a brook in the forest. However, not all of nature’s ...

“The sound machine can generate any of several types of sound, from nature [or] music,” Dr. Cory Portnuff, an audiologist at the University of Colorado Health’s Hearing and Balance Clinic, says. In ...