Sound Power Level, Lw is measured as the total acoustic power emitted by a source in all directions (does not change with the environment) to a reference value that is typically 10-12 W. Estimate the sound power level of a siren that emits 2 x T × U watts and justify your answer based on the noise level chart.

Sound Power Level, Lw is measured as the total acoustic power emitted by a source in all directions (does not change with the environment) to a reference value that is typically 10-12 W. Estimate the sound power level of a siren that emits 2 x T × U watts and justify your answer based on the noise level chart.