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

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

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 idea demonstrates sonar mapping of the ocean floor.

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

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

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

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

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

.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.

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.

This science fair project idea produces varying pitches of sound.

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.

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.

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

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

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

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.

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.

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

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

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

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

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