Equipment Sound Power Calculator

Calculate sound power level from equipment based on sound pressure measurements at a known distance.

Measured SPL at distance
dB
Distance from equipment centerline
feet
1=Free field, 2=Near reflective surface, 3=Room

Results

Equipment Sound Power Level-dB
Predicted SPL at 3 feet-dB
Predicted SPL at 10 feet-dB
References: ASHRAE Fundamentals Ch. 49, AHRI Standard 575 - Method of Measuring Machinery Sound