math lessons - Sound velocity level

Sound velocity level

The Sound velocity level or the particle velocity level tells the ratio of a sound incidence in comparison to a reference level of 0 dB.

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

The Sound 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 sound velocity level has the letter "L_v".
The unit of the sound velocity level is named "dB".
Notice: The dB is dimensionsless.

If v₀ is the standard reference sound velocity of:

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

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

01-04-2007 01:18:14
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