Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

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

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

Design a hearing protection device to protect their ears from loud noises. Examine the properties of current protective hearing devices, materials.

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

This science fair project idea produces sounds by creating vibrations using different objects.

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.

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

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.

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.