This Wikipedia article on the Doppler effect provides an explanation on what it is, information on the first analyzation, and its use in the field of astronomy and radar detection.

At this tutorial, a happy bug in the center of a circular water puddle is used to describe the Doppler effect.

This hypertext physics course page illustrates and explains the Doppler effect. Users perform practice calculations for frequency shifts using the Doppler equation.

The behavior of light waves is introduced and discussed. Also, polarization, color, diffraction, and interference are introduced and discussed thoroughly as supporting evidence of the wave nature of light.

Discusses doppler and nexrad radar systems and how they work. Explains the doppler effect. Describes some of the accomplishments of doppler radar and the radar signatures used to identify specific storm features like tornadoes.

A biographical sketch of Christian Doppler (1803-1853), the Austrian mathematician whose study on the dependence of pitch upon the relative speed of source and observer resulted in the Doppler effect.

[Free Registration/Login may be required to access all resource tools.] This guide gives a detailed overview of mechanical waves and the characteristics of waves. Covers wave behavior, including types of interference, resonance, and the...

Extensive information about how waves behave in an elastic medium. Covers different types of waves, their characteristics and behavior, the anatomy of the ear, the speed of sound in different media, the parts of a wave, and wave phenomena.

This is a glossary of terms and definitions used in Chapter 17: Physics of Hearing from the AP Physics online text.

This site from MedicineNet.com gives an Ultrasound description, why they're performed, risks, and patient preparation. A thoughrough explanation of the process is provided.