Biology
The Color of Noise: What Do Hues Have to Do with Sound?
You have probably already heard, or at least heard of, white noise. Maybe you grew up when televisions were still analog...
"acoustics"
Biology
Smooth Surfaces Are a Bat Blind Spot
Glass and metal surfaces temporarily "blind" a bat by bouncing sound waves in the wrong direction, which sometimes results in a collision. This video was reproduced with permission and was first published on September 7, 2017...
Engineering
Acoustic Holograms Create Complex Floating Patterns
Researchers can create complex patterns in air and water using ultrasonic waves. This video was reproduced with permission and was first published on September 21, 2016. It is a Nature Video production...
Engineering
Ultrasonic Levitation
Nature Video finds out how to levitate objects using sound waves. Scientists can float objects in mid-air, using just the power of sound. Now, using ultrasonic speakers, they can levitate things with more control than ever before, moving small objects in three dimensions even with the whole array turned upside down...
The Sciences
Your Telephone Is Lying to You About Sounds
Telephones lie about sounds because odd numbers aren't even. Once again with those integers and sound perception! Telephones can only pick up frequencies above 300 or 400 Hertz (cycles per second, also called Hz), but most adults’ speaking voices are lower than 300 Hz (approximately the D above middle C)...
