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

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

.Have you ever had problems with your wifi signal strength? In this experiment you will learn about how wireless signals pass through the air and solid objects.

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

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

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

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

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

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

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

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.

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 explores whether talking to a plant will help it grow.

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

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

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

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.

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

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.

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

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

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

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

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.

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