Sound Pressure Losses at Varying Distances in Air, and The Effects of Insulation Thickness on Sound Energy Absorption.

Objective: To determine the effects of distance and added insulation on sound pressure losses at varying frequencies.

Hypothesis: Obviously, the added foam and distance will decrease the dB level emanating from the sound source. The ratio of decrease will however be different for higher and lower frequencies. The loser frequencies will end in a higher dB level than the higher frequencies.