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

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.

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

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

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

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.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

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

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.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

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

This science fair project idea produces varying pitches of sound.

Get a cool and easy science fair project idea which helps high school students in understanding concepts behind the working of a microphone.

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

With this activity, not only will you be experimenting with giving accurate information, you'll also teach your child how to write good scientific procedures.

Learn how matter transmits sound with a simple, hands-on experiment using sand, water and air.

What is the Doppler Effect, or the Doppler Shift? The purpose of this science fair project is to determine how distance impacts the Doppler Effect.

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

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

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

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.

Here's an investigative activity in which your child will discover real-world names and uses for sugar and find out how it is hidden in many different foods.

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.

Let your young scientist explore a brave new world of sound with an experiment that just requires a handful of common household items.

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

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

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

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

Find a mathematical relationship between the intensity of a sound wave and distance from the sound source. Use a pedometer and a sound level meter.