Sound travels differently through open fields than the woods. When deer eat up bushes, small trees and other forest plants, it affects the transmission of bird calls and other natural sounds.
We consulted experts on how human brains perceive sound. The poor quality of the audio file can be blamed for the different ways our brains perceive it. What we expect to hear also matters.
A brain imaging study of grown-ups hints at how children learn that "dog" and "fog" have different meanings, even though they sound so much alike.
Remember that old toy called the Speak and Spell?
Scientists at the University of Texas listened to the bubbles in a champagne and a sparkling wine and found that the more expensive product had smaller, busier bubbles.