Each and every day, every one of us interacts with different sounds. These sounds can serve as a way to communicate, to inform, or to annoy us! Acoustical engineers help develop technologies that are focused on sound and are sound experts. They know about pitch and volume and how to change factors that affect these properties. Whether they work to amplify sound or to dampen it, their work is very important to us!
Knowing that sound is caused by vibrations, third graders are exploring various properties of sound. Our first focus will be on volume. How do the vibrations change when the volume gets louder? Softer? We've introduced two new technologies to help us see the differences in volume--a tone generator (with beans on top) and a door fiddle (made of string).