Particle velocity level

The particle velocity level or the sound velocity level tells the ratio of a sound incidence in comparison to a reference level of 0 dB in a medium, mostly air.

It shows the ratio of the particle velocity v1 and the particle velocity v0.

The particle velocity level is:



L_v = 20\, \log_{10}\left(\frac{v_1}{v_0}\right) \mathrm{dB} $$

where v1 and v0 are the velocities.

The particle velocity level has the letter "Lv".



v_0 = 5.0 \times 10^{-8} \mathrm{\frac{m}{s}} $$

we use "dB SVL". (SVL = sound velocity level).

Sound particle velocity v should not be confused with Sound velocity c.