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

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

This science fair project idea produces varying pitches of sound.

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 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.

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

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

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

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.

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

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

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

Get a cool and easy science fair project idea which helps high school students in understanding concepts behind the working of a microphone.

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