Sound Power Level

Sound Power Level

NO-06
ASPCSPAdvanced

Formula
Lw = 10 × log₁₀(W/Wo)
When to Use

Calculate the sound power level of a source in decibels relative to the reference acoustic power.

Symbol Legend
SymbolMeaningUnitNote
LwSound power leveldB
WAcoustic power of sourceWatts
WoReference acoustic power10⁻¹² WFixed reference

🔒

Worked Example for Blueprint Members

Blueprint members get full exam-style worked problems, step-by-step solutions, solution videos, common exam traps, and linked practice questions — for every equation.

Join Be Safe ASP | CSP Blueprint™ →