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

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

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

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.

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.

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.

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

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

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

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

This science fair project idea explores whether talking to a plant will help it grow.

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

This science project examines the history of earthquakes and what we can do to prevent future disasters.

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

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

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

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

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 experiment is to identify common materials that absorb sound waves with the greatest efficiency.