P-wave

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Related to Pressure wave: compression wave

P-wave

 (pē′wāv′)
n.
A seismic wave that travels very quickly through the earth, causing the rocks it passes through to change in volume and their particles to vibrate parallel to the direction of wave propagation. P-waves can travel through solids, liquids, and gases.

[P(rimary) wave, since it is the first type of wave to be detected by a seismograph after a seismic event.]
References in periodicals archive ?
This means that a pressure wave can be described by Navier-Stokes equations and in the first approximation by the 1D model while the biomembrane can be treated as an elastic tube.
Behavior of Shock Wave and Pressure Wave of SI Knocking with Super Rapid Compression Machine," SAE Technical Paper 2011-01-1875, 2011, https://doi.
A lot of modern technologies (in particular, electric discharge) use a pressure wave as the determining factor of the impact on the object being processed.
On a daily basis, sunlight warming the stratospheric ozone layer forces a global-scale pressure wave through the atmosphere, both into the upper atmosphere as well as toward Earth's surface, twice each day.
Radar antennas will log the pulse pressure wave that occurs with each heartbeat; algorithms will then derive blood pressure by considering the speed of this wave over the distance between the two antennas.
USPRwire, Tue Nov 10 2015] Leak Detection Market for Oil & Gas by Technology (Negative Pressure Wave, E-RTTM, Fiber Optic Cables, Vpor Sensing Tubes, Mass-Volume Balance Method, and Others), by Type (Upstream, Midstream and Downstream) and Region (America, Europe, Middle East and Africa) - Global Forecast to 2020
w] = velocity of the pressure wave in the line, in feet per second; K = bulk modulus of water (300,000 lbs.
If a sufficiently large leak occurs suddenly, for example if the pipeline is damaged by an excavator, a negative pressure wave spreads at the speed of sound in both directions along the pipeline.
The team also found that an initial small pressure wave helps prevent melting later during the gradual ramp-up of the compression to 50 million times Earth's atmospheric pressure at sea level.
Of the 192 lasers at NIF, the team used 176 with exquisitely shaped energy versus time to produce a pressure wave that compressed the material for a short period of time.
If a deflagration occurs in the dust collector, a pressure wave will travel through the pipe faster than the flame front and close the flap valve, protecting downstream personnel and equipment from injury and damage.
This can be detected by discrete sensors used for pressure wave detection -- but relies on sheer luck on positioning.
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