### Strutt Help

Empirical Generator Noise Prediction    1/1

Strutt|Input Data|Empirical|Generator inserts sound power levels for a generator into the active row of the worksheet. Please note the sound power levels are for the generator alone and does not include the power source e.g. internal combustion engine.

The overall sound power level of generators is calculated by:

L_W = 84 + 10log_10(MW) + 6.6log_10(RPM), (dB re 10-12 W)

To calculate octave band levels, the values in Table 11.26 Bies and Hansen are subtracted from the overall level.

References:

• Bies, D., Hansen, C., Engineering Noise Control, p554