Noise Level Results
Just slightly better than average results is where the 38 dB rating I got with 7.5V to these 140mm fans. This isn't bad at all and is only slightly audible from three feet away with my open air test bench.
When these fans spool up with 12V applied to them, they weren't all that bad and read 54 dB on my meter. I really think this could have been lower though as this cooler allows the fans to rattle the fins.
A simple strip or a few pads could bring these levels right down and offer great performance and near silence even abusing the system as I do.