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

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.

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

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

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

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 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.

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.

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 varying pitches of sound.

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.

.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.

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

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

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

In this cool sound resonance experiment, learn about frequency and pitch, and use a tuning fork to calculate sound velocity in air.

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 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.

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

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

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

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.