Doppler (disambiguation)

Doppler may refer to a variety of concepts, phenomena, and entities, primarily associated with the Austrian physicist Christian Doppler, who first proposed the Doppler effect in 1842. The Doppler effect describes the change in frequency or wavelength of a wave in relation to an observer moving relative to the source of the wave. This principle has been applied in multiple fields, leading to the development of various technologies and scientific methods. Below are some of the key areas and items associated with the term "Doppler."

Science and Technology

• Doppler effect - A phenomenon observed for sound, light, and other types of waves, where the observed frequency changes if the source and observer are in motion relative to each other.
• Doppler radar - A radar system that uses the Doppler effect to produce velocity data about objects at a distance, widely used in meteorology, aviation, and healthcare.
• Doppler echocardiography - A diagnostic method that employs ultrasound waves to evaluate the heart, vessels, and blood flow, utilizing the Doppler effect.
• Doppler sonography - Also known as Doppler ultrasound, a non-invasive test that can estimate the blood flow through blood vessels by bouncing high-frequency sound waves off circulating red blood cells.
• Doppler lidar - A technology used in atmospheric physics to measure the velocity of particles in the atmosphere by using laser light.

Medicine

• Fetal Doppler - A handheld ultrasound device used by healthcare professionals to detect the fetal heartbeat for prenatal care.
• Doppler fetal monitor - Similar to the fetal Doppler, it is used during pregnancy to monitor the heartbeat of the fetus.

People

• Christian Doppler (1803–1853) - An Austrian mathematician and physicist who proposed the Doppler effect, which became the foundation for many applications in science and technology.

Other Uses

• Doppler (software) - A reference to various software tools and applications that utilize or simulate the Doppler effect for various purposes, including audio effects, signal processing, and more.
• Doppler (novel) - A novel by a Norwegian author, which may not directly relate to the scientific principle but shares the name.

See Also

• Ultrasound
• Radar
• Lidar
• Sound
• Wave

This disambiguation page lists articles associated with the title Doppler (disambiguation).