Kell Systems Server Cabinets
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Noise Reduction Performance

Server noise attenuation:

18.5 dBA broadband noise reduction, measured 1.0 m / 39¨ in front of the cabinet (Representing the elimination of 98.5% of server noise)

Practical explanation:

The field of acoustics is not an area familiar to many IT managers and therefore the following guidelines are offered.

"dBA" is the common measurement unit used to quantify Sound Pressure Level (SPL), which is technical terminology for “how loud things are”. As usual with these things, there’s no need for the end user to fully understand dBA. The things that matter are how many or how few of them there are, and what that means in the real world. For reference, here are some widely-accepted examples of SPL ratings that are relevant when installing servers in the workplace:

50 dBA Background noise in an average office, without speech
55 dBA Background noise in a busy office, without speech
60 dBA Normal conversational speech
45 to 50 dBA Typical noise from fully integrated or cassette-type building air conditioning
55 dBA + Typical noise from portable air conditioners
62 dBA Typical noise from 2 x low form factor servers with average CPU loads
65 dBA Typical noise from 4 x low form factor servers with average CPU loads
68 dBA Typical noise from 8 x low form factor servers with average CPU loads
(every doubling of the number of servers leads to a 3 dBA increase in the total noise level)

In order for an installation to become unobtrusive in an office environment, the noise from the servers and other hardware in the installation must be reduced to the level of the general office background noise. At such reduced levels, the human brain perceives the noise from the servers as part of the overall background noise, and it will go unnoticed on a day-to-day basis, in much the same way that the hum from most built-in office air conditioning systems do.

The following tables give a guide to how this is achieved by the use of Kell Systems server enclosures.

Noise Reduction

Noise Reduction

PDF Download  Download the Noise Reduction Performance Datasheet



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What They Say About Us
"The acoustic cabinet is now fully installed and the performance is terrific! It's greatly improved our office working environment and I'd happily recommend your product to others in the future. Thank you again for your assistance and excellent service."

Quenifer Lee
Director, Asia Pacific, 5+Design

"The soundproofing is extremely effective, and so is the cooling system. There was no floor space or budget for a computer room, so we used a Kell PSE instead. It takes up less floor space, it cost less, and it looks good too.";

Jason Sadler
The Geodata Institute
University of Southampton

"We recently purchased 4 Kell 38U Cabinets for 3 of our regional offices and as you can imagine we are very pleased with the purchases."

Scott Greenwood
IT Infrastructure Project Manager, Money Portal Plc

"The rack we installed was lovely, very easy to work with, and the best bit was having racked all the kit, when we closed the doors finally, absolutely everyone´s head came up because all the noise just vanished. They were most impressed"
Gordon Watson
81G.org

"The Kell rack was installed, it looks great and does the job, many thanks."

William Fullerton
Systems Administrator, Dialog Semiconductor

Very tight for space in our office, I have two people working in the same room as our computer servers. The new Kell System cabinet has eliminated all high frequency server noise and all we can hear are the low frequency fans. Kind of like the noise of our office central a/c system, nothing more or worse. This is a small room, we have no issue with sound since this cabinet arrived. The build quality is amazing.

Michael J. Kravit, AIA, NCARB, RA
President, Kravit Architectural Associates, Inc.