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    quantitykind:SoundParticleVelocity
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    http://qudt.org/vocab/quantitykind/SoundParticleVelocity

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    lang:en
    Sound particle velocity
    lang:""
    http://en.wikipedia.org/wiki/Particle_velocity
    lang:""
    \(v = \frac{\partial\delta }{\partial t}\), where \(\delta\) is sound particle displacement and \(t\) is time.
    lang:""
    Sound Particle velocity is the velocity v of a particle (real or imagined) in a medium as it transmits a wave. In many cases this is a longitudinal wave of pressure as with sound, but it can also be a transverse wave as with the vibration of a taut string. When applied to a sound wave through a medium of a fluid like air, particle velocity would be the physical speed of a parcel of fluid as it moves back and forth in the direction the sound wave is travelling as it passes.
    lang:""
    belongs to SOQ-ISO