Doppler shift


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Dopp·ler shift

(dop'lĕr),
the magnitude of the frequency change in hertz when sound and observer are in relative motion away from or toward each other.
See also: Doppler effect.

Doppler shift

Dopp·ler shift

(dop'lĕr shift)
The magnitude of the frequency change in hertz when sound and observer are in relative motion away from or toward each other.
See also: Doppler effect

Doppler,

Christian J., Austrian mathematician and physicist in U.S., 1803-1853.
Doppler bidirectional test
Doppler echocardiography - use of Doppler ultrasonography techniques to augment two-dimensional echocardiography by allowing velocities to be registered within the echocardiographic image. Synonym(s): duplex echocardiography
Doppler effect - a change in frequency is observed when the sound and observer are in relative motion away from or toward each other. Synonym(s): Doppler phenomenon; Doppler principle
Doppler flow test
Doppler measurement
Doppler phenomenon - Synonym(s): Doppler effect
Doppler principle - Synonym(s): Doppler effect
Doppler probe
Doppler pulse evaluation
Doppler scope
Doppler shift - the magnitude of the frequency change in hertz when sound and observer are in relative motion away from or toward each other.
Doppler ultrasonography - application of the Doppler effect in ultrasound to detect movement of scatterers (usually red blood cells) by the analysis of the change in frequency of the returning echoes.
Doppler ultrasound flowmeter
Doppler ultrasound segmental blood pressure testing

Doppler

an Austrian physicist and mathematician.

duplex Doppler imaging
Doppler effect
the relationship of the apparent frequency of waves, as of sound, light and radio waves, to the relative motion of the source of the waves and the observer, the frequency increasing as the two approach each other and decreasing as they move apart.
The Doppler effect can be experienced when a train whistle or automobile horn produces a continuous sound as it approaches and passes a listener. The pitch of the sound suddenly falls as the source passes the listener.
Doppler shift
the change in frequency that occurs when high frequency sound waves are reflected from a moving surface; the basis for doppler ultrasound.
References in periodicals archive ?
The peak Doppler shift in microvolts was obtained for three trials for each maneuver.
This result uses only the neo-Lorentz Doppler shift factors, and these have been confirmed by analysis of the Earth-flyby Doppler shift data [6].
These effects, which will not be discussed further, are cavity pulling, distributed-cavity phase shift (first-order Doppler shift), Rabi pulling, Ramsey pulling, second-order Doppler shift, dc Stark shift, and the Bloch-Siegert shift.
The results agree with those form the Miller gas-mode Michelson interferometer, and from the NASA flyby Doppler shift data.
This Doppler shift of light waves is used by highway patrols to measure the velocity of cars on the highway.
Results from Michelson-Morley [3,4], Miller [5], Torr and Kolen [6] and DeWitte [7], are now in remarkable agreement with the velocity of absolute motion of the earth determined from NASA spacecraft earth-flyby Doppler shift data [8,9], all revealing a light/EM speed anisotropy of some 486km/s in the direction RA=[4.
Also, the well-known Doppler shift, in which the frequency of electromagnetic radiation from an object increases as the object approaches, is expected to reverse for metamaterials.
Patent 7,421,342 B2 entitled "Network-Assisted Global Positioning Systems, Methods and Terminals including Doppler Shift and Code Phase Estimates" improves the efficiency of Global Positioning System (GPS) capabilities when using future hybrid satellite-terrestrial phones and devices.
Crepp's work would provide precision infrared Doppler shift measurements to the LBT, an international consortium in which Notre Dame is a partner.
Data from this 1st order in [upsilon]/c experiment agrees with the speed and direction of the anisotropy results from 2nd order in [upsilon]/c Michelson gas-mode interferometer experiments by Michelson and Morley and by Miller, see data in [2], and with NASA spacecraft earth-flyby Doppler shift data [3], and also with more recent 1st order in [upsilon]/c experiments using a new single clock technique [2], Sect.
Doppler Compensation: Broadband access for passengers traveling at high rates of speed on trains or planes is often compromised due to a Doppler Shift of the RF signal.
This Doppler shift will indicate wind speed to an accuracy of a meter per second.