Comment by ianburrell
18 hours ago
That's why important to give the scale. dBfs is full scale level, and db SPL is sound pressure level.
18 hours ago
That's why important to give the scale. dBfs is full scale level, and db SPL is sound pressure level.
Yep.
"Sound Power Level SWL", "Sound Pressure level SPL", and "Sound Intensity Level SIL" are different quantities which should not be confused. - https://sengpielaudio.com/calculator-soundpower.htm
A sound source produces sound power and this generates a sound pressure fluctuation in the air. Sound power is the distance independent cause of this, whereas sound pressure is the distance-dependent effect.
Sound pressure p is a "sound field quantity" and sound intensity I is a "sound energy quantity". In teachings these terms are not often separated sharply enough and sometimes are even set equal. But I ~ p2.