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Sound

Science activity that demonstrates the Doppler effect
Doppler Effect

The Doppler effect causes the “neeeeeoowwm” sound of cars.

Science activity that demonstrates the effect of air density on sound
Conversation Piece

A balloon acts as a lens to focus sound.

Science activity to build a musical instrument that uses vibrations
Coffee-Can Cuíca

Build a cuíca—a musical instrument—and play with vibrations.

Science activity to create a toy that sounds like a swarm of buzzing bees
Bee Hummer

This simple toy sounds like a swarm of bees.

Science activity that explores how waves travel and interact
Anti-Sound Spring

Send waves down a spring to watch them travel and interact.

Science activity that demonstrates resonance in a musical instrument
Straw Oboe

Two lips make sound.

Science activity visualizing sound waves
Vocal Visualizer

Use your voice to transform laser light into dazzling patterns.

Science activity that uses a coil of wire, a paper cup and a magnet to create a radio speaker
Cup Speaker

Make a speaker that turns changing electric current into sound.

Science activity that demonstrates sound conduction
Sound Bite

Tune in to tunes with your teeth.

Science activity that explores audio signal transmission
Modulated LED

Listen to a beam of light.

Science activity that demonstrates magnetic field coupling
Modulated Coil

Hear the magnet!

Science and engineering activity to make a record player
Groovy Sounds

Make a record player with a pencil, pin, and paper.

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