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 "v"₁ and the particle velocity "v"₀.

The particle velocity level is:

:$L\_v\; =\; 20,\; log\_\{10\}left(frac\{v\_1\}\{v\_0\}\; ight)\; mathrm\{dB\}$

where "v"₁ and "v"₀ are the velocities.

The particle velocity level has the letter "L"_v".

The unit of the particle velocity level is named "dB".

Notice: The dB is dimensionless.

If "v"₀ is the standard reference particle velocity of:

:$v\_0\; =\; 5.0\; imes\; 10^\{-8\}\; mathrm\{frac\{m\}\{s$

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

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