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

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Determine the relationship between the speed of a sound and the temperature of the air it passes through.

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.

This science fair project idea produces varying pitches of sound.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

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.

Check out this fun science fair project idea to learn about seismic waves and how fast they travel during an earthquake.

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

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

Find out the differences (if any) in the frequencies of voices produced from a computer, from a phone, and directly coming out of the voice box of a human.

Make stunning pendulum waves and learn the math behind the patterns generated with this cool and easy science project.

This experiment investigates whether there are certain sounds that affect men and women differently

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

This project determines what percentage of test subjects react adversely to the sound of fingernails on a chalkboard and explores their physiological responses.

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.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

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

The goal of this science fair project is to evaluate the effect of heat on sound wave frequency.

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.

This classic children's game demonstrates how sound travels through air vs. through a solid.

This science project examines the history of earthquakes and what we can do to prevent future disasters.