Sound particle velocity

The sound particle velocity, Particle velocity, or sound velocity is the velocity v of air particles in m/s.
It is not to be confused with the speed of sound c, also measured in m/s. Usually in acoustics the particle velocity is measured as the particle velocity level L_v in decibels.

The particle velocity v in m/s is:

$v = \frac{p}{Z} = \frac{J}{p} = \sqrt{J / Z}$

Sound pressure p in N/m² = Pa
Acoustic impedance, sound impedance, or Characteristic impedance Z in N·s/m³<
Sound intensity J in W/m²<

The particle velocity or the sound velocity is connected to particle displacement or particle amplitude ξ in m by:

$\xi = \frac{v}{2 \cdot \pi \cdot f} = \frac{p}{Z \cdot 2 \cdot \pi \cdot f}$

acoustic impedance Z in N·s/m³
sound velocity v in m/s
frequency f in Hz
sound pressure p in N/m²< = Pa
angular frequency ω = 2 · π · f

External link

Ohm's law of the acoustics - calculations (http://www.sengpielaudio.com/calculator-ak-ohm.htm)
The sound velocity (particle velocity) can be directly measured with Microflown (http://www.microflown.com)

de:Schallschnelle

Categories: Fluid dynamics

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