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

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.

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.

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

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

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

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 varying pitches of sound.

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

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

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

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.

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

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.

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.

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.

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

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.

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

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

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.

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

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

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