The chart below shows the noise measurements for zero and 605 RPM, 10 Meters from the exit. This was done in haste at a potential buyers request. This distance was measured out before my arrival. I later realized that this measurement was made in a place that is covered by the concrete deck located between the net frame and building. This may have dramatically added to the measured sound level either by reflecting some additional sound down to the meter, by creating a resonant space, or both. The upper surface was approximately 6 feet above the meter.