In this fun science fair project idea learn about the multiple sources of radio waves and fin out how difficult it is to block them.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

In this project students determine which instruments composers use to create birdsongs and birdcalls in classical music.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This awesome diffraction grating experiment puts high school students' applied math skills to the test by having them calculate the wavelength of laser light.

This science fair project idea demonstrates sonar mapping of the ocean floor.

This science fair project idea produces sounds by creating vibrations using different objects.

This science fair project idea shows how a vibrating object transfers energy to whatever it touches.

In this science fair experiment, students learn about the scientific principles behind Doppler ultrasound.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

This science fair project idea explores whether talking to a plant will help it grow.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

The objective of this experiment is to identify common materials that absorb sound waves with the greatest efficiency.

Find out whether matching resonant frequencies can cause objects to shatter.

This science fair project idea produces varying pitches of sound.

The purpose of this science fair project is to build a basic radio.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

Design a hearing protection device to protect their ears from loud noises. Examine the properties of current protective hearing devices, materials.

Demonstrate how we are able to locate sounds, echolocation. Have a blindfolded subject locate you by the sound of your clapping.