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

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

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 explores whether talking to a plant will help it grow.

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.

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.

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

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

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

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

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

Explore the wave-particle duality of light! Learn how light can behave as both a wave and a particle in this cool physics science fair project idea for kids.

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

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.

Look for a correlation between temperature and the intensity of cricket chirping. Measure ambient temperature and sound intensity in decibels.

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

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

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

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

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

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

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

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

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

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

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

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

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