Topic: frequency

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Shattering glass with the World’s Largest Horn

How do horns amplify sound? Why are they flared at the ends? And how do airhorns work? Mark Rober wanted to find out so he spent eight months building a massive air horn... perhaps the world's largest horn. In this...

Kids Meet Opera Singer Angel Blue

Meet Angel Blue. She's an award-winning American operatic soprano, a singing voice that "has the highest vocal range of all voice types," who's performed all over the world. In this episode of Kids Meet, Angel Blue de...

How does sound travel to our brains?

How does a sound, like music played on a trumpet, travel from the source through our ears and to our brains? This animated video from the National Institute on Deafness and Other Communication Disorders describes the ...

A colorful Chladni pattern demonstration

Watch as Chladni patterns form on a metal plate, a teaching demonstration "spiced up" with colored sand by associate professor of physics at UNC Charlotte skullsinthestars. The video is accompanied by Prelude from Sui...

The Science of Hearing

The ability to recognize sounds and identify their location is possible thanks to the auditory system. That’s comprised of two main parts: the ear, and the brain. The ear’s task is to convert sound energy into neural ...

The Coupled Pendulum, a physics demonstration

See the simple laws of physics at work: Two pendulums swing on a string, transferring energy from one to the other and back again. This demonstration by MarkHacks, made with cardboard, screw hooks, tape, string, and t...

“Balloons look really weird when they resonate.” – Steve Mould

What is the resonant frequency of a balloon? Steve Mould hooked up a balloon to a scientific vibration generator to find out. Resonating balloons look really odd on camera. What you see is a sort of slow motion. ...

Go inside an ice cave to see nature’s most beautiful blue

Where do glaciers and icebergs get their beautiful blue color? This unique blue might be nature’s most brilliant, and the color arises in a very special way thanks to some surprising interactions between light and wat...

Will Computers Ever Hear Like People Do?

On the left, everyday sounds are being recorded. On the right-side, spectrograms show frequencies of the sound waves, their volume and visual patterns over time. They were created with this Chrome Music Lab experiment...

Invisible Nature: Code of the Treehopper

Hiding in plain sight and deceptively still, treehoppers have evolved an ingenious way to communicate—using a complex series of vibrations. Now, scientists are listening in and starting to crack the treehopper code. A...

H is for Hertz – Circuit Playground

How does the internet work on your laptop, phone, and other wireless devices without any connecting cables? How does your television remote work? In this episode of Circuit Playground, Adabot learns about electromagne...

Why does a frozen lake sound like a Star Wars blaster?

Ice can make all sorts of sounds: cracking, crackling, musical booooooms... and that pew! pew! Star Wars blaster sound. How? In this episode of NPR's Skunk Bear, we learn about acoustic dispersion and how the phenomen...

DISHDANCE, a time lapse for The Skyglow Project

Created for The Skyglow Project, an astrophotography book and time lapse series by Gavin Heffernan and Harun Mehmedinovic, DISHDANCE observes massive radio telescopes during the day and night. The project also capture...

Macro Video of Iridescent Soap Bubbles – Stereokroma

The next time you get the opportunity to blow some soap bubbles, be sure to take a long, close look at them. Those ever-changing rainbows sliding around across the surfaces of the bubbles can be spellbinding... like a...

The Inverted Glass Harp

We love glass harps – instruments made from wine glasses that are filled with different amounts of water to create a series of desired pitches. In The Inverted Glass Harp, Dan Quinn shows us that empty glasses can als...

Resonance, forced vibration, and a tuning forks demo

A U-shaped fork of steel first invented in 1711 by trumpet player John Shore, the tuning fork is a tool produces a specific note that helps musicians keep their instruments in tune. They also are a great conversation ...

The Octobass – What does this huge instrument sound like?

Want a low-end rumble in your orchestra? You need an octobass, a bowed-string instrument that's so massive, it requires a platform and a series levers to play. Only three were originally made by their inventor Jean-Ba...

A waterless & chemical-free sound wave fire extinguisher

Using low-frequency sound waves to put out flames, this experimental fire extinguisher is the work of George Mason University engineering seniors Viet Tran and Seth Robertson. Watch as they Pump Up the Bass to Douse a...

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