[CentOS] Noise Cancellation of Server Noise

Quoting Digimer <lists at alteeve.ca>:

> On 24/12/16 04:43 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.
>
> There are rack chassis designed to reduce noise. An example are the APC
> NetShelter CS line.
>
> http://www.apc.com/shop/ca/en/categories/racks-and-accessories/racks-and-enclosures/netshelter-cx/_/N-1ks6cn2
>
> I don't know of any other way to make servers quieter, though.

noise cancelling headphones?
>
> --
> Digimer
> Papers and Projects: https://alteeve.ca/w/
> What if the cure for cancer is trapped in the mind of a person without
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