Estimate the total sound power level (Lw) based on the fan's operating point and efficiency.
Note on Prediction: This calculation provides an **empirical estimation** based on the relationship between fan input power and sound generation (Lw is proportional to 10 * log10(W_input) , plus a correction factor for fan type. Actual sound power levels may vary significantly based on fan design, casing, installation, and specific test conditions. This tool is for preliminary estimation only.