longitudinal wave

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longitudinal wave

(General Physics) a wave that is propagated in the same direction as the displacement of the transmitting medium. Compare transverse wave
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

longitu′dinal wave′

a wave in which the direction of displacement is the same as the direction of propagation, as a sound wave.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

lon·gi·tu·di·nal wave

A wave in which the particles of the medium through which the wave moves vibrate in the same direction as the wave travels. Sound waves are a type of longitudinal waves. See more at wave. Compare transverse wave.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Bending wave is a dispersive wave and the wave velocity is different from that of the longitudinal wave. Waves reflecting from the crack surface interferes with that from the inner and outer surfaces of the DP.
In case of the perfect fluid only displacement [u.sub.n] excites the longitudinal wave in outer fluid.
Nonlinear longitudinal wave was monitored at different positions along the length direction of tensile specimens for each sample.
Table 4 summarizes the range of density, longitudinal wave velocity, and porosity of samples.
One can generalize the phase velocity of a longitudinal wave for all states of the matter
We denote the displacement of the reflected longitudinal wave by [u.sub.1], the lateral displacement produced by the flexural wave by [v.sub.1] in beam 1, the longitudinal displacement in string 2 by [u.sub.2], the lateral displacement in string 2 by [v.sub.2], the longitudinal displacement in beam 3 by [u.sub.3], and the lateral displacement in beam 3 by [v.sub.3].
Where m* is the band-edge effective mass, k is Boltzmann constant, T is the lattice absolute temperature, h is Plank constant divided by 2, Tu* Tu gives the tunneling probability density of the outgoing electron, F is Fermi energy level, l is energy of the electron associated with longitudinal wave vector of the electron in the conduction band, V is the applied voltage.
For example, longitudinal wave, transversal wave and some types of surface waves are observed in bulk specimen.
As shown in Figure 3, the longitudinal wave velocity and density of the sandstone specimens heat treated at 800[degrees]C were both lower than those at room temperature, with difference amplitudes of 66.68%-71.84% and 5.31%-11.02%, respectively.
The nonzero elements [b.sub.13], [b.sub.24] of the matrix B determine the mutual transformation of longitudinal and transverse waves polarized along x-axis, whereas elements [b.sub.15], [b.sub.26] describe the relationship between transverse waves polarized along y-axis and longitudinal wave. Nonzero element [b.sub.45] defines the mutual transformation between the waves of transverse polarization.
Thus, the spread speed of the longitudinal wave of the ultrasound in the drilling mud is [c.sub.L].
where E is ultrasonic Young's modulus, G is Kirchhoff's modulus, [mu] is Poisson's Ratio, [rho] is apparent density, [C.sub.L] is speed of a longitudinal wave, and [C.sub.T] is speed of a transverse wave.