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 Doppler shift is determined by the user terminal access Elevation angel and the satellite tangential velocity, so Doppler shift in each LEO satellite channel multi-path can be approximated equal.
While, for fast fading channels with normalized Doppler shift [f.
to analyze the autocorrelation coefficient of the amplitude and field strength distribution [13-15], and some analytical formulas for Doppler shift and bandwidth of radar echoes backscattered from time-varying sea surface are derived by Wang et al.
Doppler shift, used as an index of sternal skin stress, was recorded continuously as the subject performed three trials of each lift.
Considering the effect of Bragg frequency, the total Doppler shift [f.
In this case, Doppler shift will have minimal and neglectable effect.
The difference between the frequencies measured at these two antennas is caused by the Doppler shift from the rate of change of distance of the moving antenna from the transmitter.
Thus, we are told that the system is not pioneering, not unique, uses Doppler shift and not GPS (apparently), is not in real time, is unstable.
The effects of noise variance and Doppler shift on acquisition performance are also investigated.
From the Doppler shift in the signal -the equivalent of a police car's siren dropping in pitch as it races away from you -it can also calculate the target object's speed.
The induced change caused a Doppler shift and a narrowing of bandwidth.
This non-contact, laser velocimeter employs Laser Doppler Shift Technology to offer accurate and repeatable measurements of speed and length Contact: 1-508-832-3456