. "velocidad ac\u00FAstica de una part\u00EDcula"@es . . "\u0633\u0631\u0639\u0629 \u062C\u0633\u064A\u0645"@ar . . "velocidade ac\u00FAstica de uma part\u00EDcula"@pt . . . "\\(v = \\frac{\\partial\\delta }{\\partial t}\\), where \\(\\delta\\) is sound particle displacement and \\(t\\) is time."^^ . "velocit\u00E0 di spostamento"@it . "http://en.wikipedia.org/wiki/Particle_velocity"^^ . "belongs to SOQ-ISO" . "v" . . "Schallschnelle"@de . "\u7C92\u5B50\u901F\u5EA6"@ja . "pr\u0119dko\u015B\u0107 cz\u0105stki"@pl . "sound particle velocity"@en . "pr\u0119dko\u015B\u0107 akustyczna"@pl . "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." . "vitesse acoustique d\u2018une particule"@fr .