Wave Velocity
Wave Velocity - Related Videos
00:51
Velocity and Acceleration of a Wave
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2025
A wave propagates through a medium with a constant speed, known as a wave velocity. It is different from the speed of the particles of the medium, which is not constant. In addition, the velocity of the medium is perpendicular to the velocity of the wave. The variable speed of the particles of the medium implies that there must be acceleration associated with it. The velocity of the particles can be obtained by taking the partial derivative of the position equation with respect to time. We can...
08:07
Ultrasound-based Pulse Wave Velocity Evaluation in Mice
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Cited by 25 •
2017
Arterial stiffness represents a key factor in cardiovascular disease and pulse wave velocity (PWV) can be considered as a surrogate index for arterial stiffness. This protocol describes an image processing algorithm for calculating PWV in mice based on ultrasound image processing that is applicable at different arterial sites.
06:08
Pulse Wave Velocity Testing in the Baltimore Longitudinal Study of Aging
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Cited by 11 •
2014
Pulse wave velocity (PWV) measurement assesses arterial stiffness by a tonometry-based system that measures the speed with which arterial pressure wave travels along the arterial tree, typically approximating the time that it takes this wave to travel from the descending aorta (using the carotid artery as a surrogate) to the femoral artery. Carotid-femoral PWV increases two- to threefold across the adult lifespan.
05:51
Measuring the Carotid to Femoral Pulse Wave Velocity (Cf-PWV) to Evaluate Arterial Stiffness
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Cited by 20 •
2018
This protocol describes a method to standardize the measurements of carotid-femoral pulse wave velocity to evaluate arterial stiffness.
09:12
Sound Waves and Doppler Shift
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2023
Source: Arianna Brown, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Waves are disturbances that propagate through a material medium or empty space. Light waves can travel through a vacuum and some forms of matter, and are transverse in nature, which means that the oscillations are perpendicular to the direction of propagation. However, sound waves are pressure waves that travel through an elastic medium like air,...
FAQs
For a periodic wave, multiply its frequency by its wavelength using v = fλ. Frequency describes how often the pattern repeats, while wavelength describes the spatial distance between repeating features. This relationship allows researchers to calculate velocity when two of these quantities are known, supporting predictions about when a wave will reach a location and how its pattern will behave.
The medium’s physical properties influence how quickly a mechanical disturbance propagates. Tension and density are especially important: changing either can alter the resulting wave velocity. Considering these variables helps explain why the same type of disturbance may travel at different rates in different materials or under different physical conditions, which is important in materials testing and wave analysis.
Wave velocity includes a direction as well as a rate, so analysis must consider where the disturbance or phase is traveling. Direction becomes particularly important when waves encounter boundaries or changes in a medium, because the wave may reflect, refract, or transmit energy. Tracking direction therefore helps predict the wave’s subsequent path and arrival behavior.
These wave types are examined in different physical settings, so their velocities depend on the relevant medium or space and its properties. Sound, water, and seismic waves provide examples of disturbances whose propagation is linked to material conditions, whereas electromagnetic waves can be considered in space as well. Comparing them shows why velocity is central to diverse areas of physics.
A practical determination can use the frequency and wavelength of a periodic wave, then apply v = fλ. Alternatively, observations of a wave’s propagation can be interpreted alongside the properties of its medium, such as tension and density for a mechanical wave. The selected measurements depend on whether the investigation emphasizes the repeating pattern or the material conditions controlling travel.
Wave velocity provides timing and propagation information that supports several applications. In imaging and materials testing, it helps characterize how waves move through materials. In communications, propagation behavior helps describe signal travel, while earthquake analysis uses seismic-wave behavior to study disturbances. The same physical quantity therefore connects laboratory measurements with practical interpretation of wave events.