On 12/24/2016 03:43 PM, H wrote:
Has anyone come across a device that could cancel out the noise from servers, ie. the fan noise? I have a server rack near my office and would like to see if i can decrease the noise level. It would seem to me that the steady drone of the fans could be cancelled out to a large extent.
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temperature regulated fan speed can reduce noise.
use of a baffle box with styrofoam or thin foam rubber lining.
-----+-----+ fan / | | /\ | | --+-----+--- ^ ^ baffles
spacing between upper and lower baffles must be equal to or larger than diameter of fan so as to not restrict flow. also, making enclosure 2" larger than fan will help reduce restriction.
see:
http://www.rotron.com/techcorner/acoustic.aspx http://ipnpr.jpl.nasa.gov/progress_report2/42-56/56O.PDF