This Webpage Uses Centuries-Old Physics To Let Anyone Scroll Hands-Free

The Doppler effect is a well-documented phenomenon in physics which causes a change in the frequency of a wave as the source moves closer to the observer. It's the science behind satellites and speed cameras alike. And, in the hands of one computer science student, it can make a little magic happen on your computer. » 3/23/15 10:00pm 3/23/15 10:00pm

Hand-Held Doppler Lets You Listen to Your Own Brain

This is a handheld Doppler unit, and it's designed to let you listen to the blood rushing around inside your head. Why would you want to do that? Well, detecting how regular the bloodflow in your head is is how one detects a concussion, so having this on the sidelines of a football field or in a medics pack on a… » 12/14/07 2:28pm 12/14/07 2:28pm