How many decibels in a pascal?

Answer 1

1 pascal (Pa) is equivalent to 94 dBSPL.

Reference sound pressure po = 20 µPa = 2×10^−5 Pa (Threshold of hearing)

Reference sound pressure level Lpo = 0 dB-SPL (Threshold of hearing level)

Get sound pressure level Lp in dB when entering sound pressure p = 1 Pa:

Lp = 20×log (p / po) dB = 20×log (1 / 2×10^−5) =

20×log (1 / 0.00002) = 20×log (50000) = 94 dB.

Answer 2

There is no direct conversion between decibels (dB) and pascals (Pa) as they measure different quantities. Decibels are a unit of measurement for the intensity of a sound, while pascals measure pressure. Sound pressure level in decibels can be calculated from a reference sound pressure level of 20 micropascals.