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

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.

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.

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

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.

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

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

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

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.

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

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.

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

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

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

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

This science fair project idea produces varying pitches of sound.

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.

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

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

This experiment will explore how mallets of various materials and weight create sonic tones of varying lengths.

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

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.