.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.

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

What is the Doppler Effect, or the Doppler Shift? The purpose of this science fair project is to determine how distance impacts the Doppler Effect.

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

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

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.

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

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

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

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

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

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

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

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

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

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.

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.

This science fair project idea produces varying pitches of sound.