Determine the intensity of a 118-dB sound. The intensity of the reference level required to determine the sound level is 1.0×10−12W/m2.

The sound is .

The intensity of the reference level is .

The intensity of sound in decibels is .

The intensity of the sound is .

Example: 30 db [a] divide by 10 = 3 [b] raise 10 to that power = 10³ = 1000 [c] multiply 10^-12 by 1000 = 10^-9 watts/m²