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Silencer Box for NI PXI/PXIe Chassis
mrkvolf
Member
04-03-2015 02:58 AM - edited 04-03-2015 02:58 AM
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Hello All,
we have NI PXIe-1078 (with 2 fans) in the office. It's quite noisy (50dBA).
50dBA are also limit of acoustic emissions for creative headwork given by norms and law in our country.
I would like to ask if you know some effective solution:
- hand-made silencer box
- cheap silencer box to buy
NI PXIe-1078
http://www.ni.com/pdf/manuals/373204c.pdf
Acoustic Emissions
Sound Pressure Level (at Operator Position)
Tested in accordance with ISO 7779. Meets MIL-PRF-28800F
requirements.
Auto fan (up to ~30 °C ambient) ........... 49.9 dBA
High fan.................................................. 65.4 dBA
Sound Power
Auto fan (up to ~30 °C ambient) ........... 59.3 dBA
High fan.................................................. 74.1 dBA
DStavilaNI
NI Employee (retired)
04-06-2015 10:14 AM
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Dear Marek_V,
Unfortunately NI doesn't have a ready made solution for this kind of a PXI enclosure. There are however a couple ideas that you could try
( https://forums.ni.com/t5/PXI/Is-there-a-way-to-reduce-PXI-1002-Chassis-fan-noise/td-p/106384 ) :
1. The best way to reduce noise on a PXI chassis is to fill all empty slots with filler panels.
2. Another solution is to replace the fan with a quieter one, or swap it for one with a thermistor. You can find fans out there that fit in the standard opening that have thermistors, so that they run high speed when the chassis is hot, and low speed otherwise - however, this might void the warranty.
3. You could look for a manufacturer that is building this kind of industrial enclosures - but this might prove to be the most expensive solution : for example http://www.bco-inc.com/bcoRuggedPXIPlatform.htm
4. You could build a custom ( non-expensive ) enclosure using acoustic isolation materials, somewhat similar to a soundproof PC cabinet.
You can get some ideas by watching this video, dedicated to silencing a vacuum cleaner - it proves to be quite effective.
https://www.youtube.com/watch?v=Bd2nhNf9Tp8
Regards,
Denis
