ThresherDoppler

The Doppler Effect describes the change in frequency of a wave for an observer moving relative to the source of the wave.One use for this effect is echocardiography. This enables ultrasounds to be used for identifying the speed and direction of blood flow at any given point, as well as creating maps/views of the and the entire circulatory system. This is done by using a Doppler ultrasound to send a pulsing or continuous wave through any arbitrary point along the circulatory system, and using the reflected waves to graph out an image of the heart or veins.

Another use for the Doppler Effect is its use in military endeavors. Using, the military is capable of viewing submarines and displaying the size and speed of these vehicles, as well as allowing for detection of underwater noises of military interest, search and rescue beacons, or as communications devices between air and submarine forces.