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

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

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

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

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

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

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

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This science fair project idea produces varying pitches of sound.

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

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 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.

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

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