sound waves

NOVA scienceNOW: Smart Bridges

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This video segment adapted from NOVA scienceNOW features two engineering innovations designed to improve structural safety in bridges. The video shows how sound waves can be used to detect cracks in steel and other signs of bridge instability undetected by the human eye. A second approach involves painting onto the bridge a "sensing skin" made of microscopic carbon nanotubes that use electrical currents to reveal structural damage or weak spots. This resource is useful for introducing components of Engineering Design (ETS) from the Next Generation Science Standards (NGSS) to grades 6-12 students.

This video is available in both English and Spanish audio, along with corresponding closed captions.

What is Sound? | Ready Jet Go!

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Jet is all ears when it comes to learning about sound. In this clip from Ready Jet Go!, Sean comes over to Jet's garage to work on his sound experiment in peace and quiet. He explains to Jet what sound is and how it works.

Longitudinal Waves | UNC-TV Science

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Longitudinal waves carry energy through air, water and solids by compressing and expanding the medium in the same direction it transfers the energy.

Sound | Crash Course Physics

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We learn a lot about our surroundings thanks to sound. But...what is it exactly? In this episode of Crash Course Physics, Shini goes over some of the basics (and some of the not so basics) of the Physics of Sound.

Robot Submersible Takes Technology to the Bottom of the Ocean in Search of Flight 370

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Have your students learn about the mission to find Malaysia Airlines flight 370 with this PBS NewsHour video and educational materials from April 15, 2014. Search crews prepared a robot submersible to dive deep into the Indian Ocean six days after the last known signal from what may be the recorder from the missing Malaysia Airlines plane. For further background and materials to support student understanding of the issue see the Teacher’s Guide, Student Handout, and Informational Text in Support Materials.

Ready Jet Go! - Sound Waves | Science Crafts for Kids

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Astronomer Amy Mainzer shares her love of science with Ready Jet Go! fans in her science videos on topics such as sound waves, asteroids and orbits. In this activity, you and your child can explore the science of sound by conducting a simple experiment with kitchen wrap and some sand.

This Vibrating Bumblebee Unlocks a Flower's Hidden Treasure | Deep Look

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Most flowering plants are more than willing to spread their pollen around. But some flowers hold out for just the right partner. Bumblebees and other buzz pollinators know just how to handle these stubborn flowers. They vibrate the blooms, shaking them until they give up the nutritious pollen.

Teachable Moment: Mach and Supersonic | Fast Forward

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Once you know how planes fly, you’ll want to know how fast they go. Here you'll find explanations of the terms mach and supersonic.

The Spooky Sound of the Theremin

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The theremin player explains the instrument, and the Philharmonic plays the scores from Mars Attacks! and Frankenweenie.

Noise Control and the Decibel | How We Got to Now: Sound

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Stand on the corner of 34th Street and 6th Avenue in New York City with How We Got to Now host Steven Johnson, and explore the history of attempts to control noise. Historical footage bring to life New York City in the 1920s, when Harvey Fletcher and the Noise Abatement Commission created more accurate ways to measure noise levels, and helped establish the decibel as the unit of measurement to do just that.

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