Actually, the lion's share of noise heard from a fan is NOT the moving air, but the turbulence over the fan blades... This is a VERY large topic that I don't want to bore the list with.
______________________ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 7/15/2016 8:17 AM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote: > > I often here of people replacing fans with quiter ones, but I suspect that > all they really do is reduce the airflow. I believe that most of the noise > one hears is the movement of the air. From what I have read, sleve bearing > fans make a bit less noise than ball bearings fans. However, although the > MTBF of both types is similar at 20 degree C, the MTBF of sleve bearing > fans decreases quite a bit with only a modest increase in temperature. > > Dave. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
