In response to yesterday's post about acoustic noise measurements, Matt Palmer, Rog and Michael Greb have pointed out that a "bel" is the base unit of "decibel", with a decibel being a tenth of a bel. That much should have been obvious to me, but wasn't.
Michael reckons 37dB isn't loud at all, which means that computer should be a good purchase. Excellent news!
Thanks for the responses guys.
The reason I sold off the server I'd bought on eBay is because of the noise it generated. I already live right under the flight path to Sydney airport, so I don't need my own jet engine noise inside as well. So I'm looking around for a similarly specced machine, in workstation configuration rather than server.
IBM have lots of documentation about their products, and I've found a workstation model I like that's on eBay at a keen price. But I can't understand the noise specifcations they use, and Wikipedia hasn't been all that helpful.
What's specified is this:
Acoustical noise emission: Declared (upper limit) sound power levels: 5.2 bels idle 5.3 bels operating Average sound pressure levels: At bystander position (1 meter): 37 dBA idle 39 dBA operating
So what does that mean? Is "bels" another word for decibels? And as it's a ratio, I'm unclear how to read it. Some resources I've found put 30 dB as the sound of a quiet theatre, and 60 dB as a normal household television when switched on. So is 39 noisy or pretty reasonable? Let me know and I'll post the results for posterity.
I'm finding blogging like this quite helpful. I guess the audience is pretty big, what with it being on the SLUG, Linux Australia, GLLUG and Linode planets. Certainly getting lots of helpful responses to questions I pose. All without a commenting system!
Okay the server I I advertised yesterday has sold to a mate of my brother-in-law. Looks like it'll be doing service as a (very capable) file server. Now looking for similar-spec hardware that doesn't sound like a jet engine and will happily take TV tuner cards...
Am I the only one who finds this a little disturbing? Spotted on this New York Times page.
Hi folks. I bought this server on eBay a couple of months ago and have decided it doesn't fit my purpose. It's an amazing piece of hardware, but it's as noisy as a jet engine and is a bit finnicky about the PCI devices you plug into it. As I want it to be a MythTV server, that's a bit of a showstopper.
It's a great piece of kit: dual 1.4 gig PIII Xeons, 2 gigs of registered RAM, 288GB of RAIDed SCSI drives (AcceleRAID 352 uses DAC960 module), dual NICs, dual redundant PSU. All the high-end server stuff you'd expect. It would make an amazing application or file server, provided you don't want to plug any extra PCI devices in.
I paid $340 for it and would be happy to see it go to someone reading this blog for that, losing the freight I can chalk up to experience. Provided you pick it up from St Peters, Sydney and pay cash. Other arrangements can be made by contacting me.
I'll give it until the end of the week before putting it up on eBay again, so get in touch if you're interested. I can get you more detailed specs and photos if that helps, and this is a starting point..
Australia is apparently experiencing the worst drought in living memory. You could've fooled me! Since moving back to Sydney from London it's rained more than it ever did in London, and that's the city with the reputation for rain. What's more, the rain here actually gets you soaked, unlike the light drizzle in London.
New Year was good. Part at Maz and Matt's place, which was loads of fun and everyone made an effort to dress up. Some photos up on Justine's site.
Well it's Xmas here in Sydney and it's pretty warm and humid, raining but it's supposed to clear in the morning for the big day. Xmas is more hectic, as expected, being in the same country as the family. Yesterday we went down to see Holly's Dad in Wollongong. Tomorrow we're opening presents with my niece in the morning, then dinner up on the Central Coast with the family in the evening.
Still, it's a nice change to be warm. Ben has a swimming pool so we can go swimming. Then up the Coast we can go surfing every day. Woo!
I'm back at work on the 2nd January.
Have a fun and safe break everyone. Be especially careful on the roads. Every dickhead going seems to be out there, and a good proportion of them are probably drunk as a skunk.
I read some of In Search of Perfection as described yesterday before going to sleep last night. Not a good idea. I woke up craving fish and chips. Not really breakfast food now, is it?
On Saturday I did some farting about in the house. Got flyscreens made for the windows, improved the window security a little, toyed around with my new Internode ADSL and Nodephone VOIP stuff. I also did my Driving Knowledge Test down at the RTA and got my learner's license. The test was bloody easy, and I can't believe you could fail it!
Sunday I went and (re-)joined Alfalfa House, a food co-operative on Enmore Road. I used to be a member before I moved over to London and it's changed a fair bit. It's no longer compulsory to do work, though you get an extra discount for one shop if you do a two hour shift. The range of foods has also improved, with lots more reasonably priced organic fruit and veg. Though in one area the selection has reduced: muesli. There used to be a great range, now there's only two. I might have to make my own.
Then I wandered down King Street and picked up a yummy Burek, got a hair cut, dropped into Fiji Market and bought some spices, then headed home.
I'm enjoying being back in the Inner West. Especially liking having a garden!