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Old 11th January 2006, 20:21   #31
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Quote:
Originally posted by kr15t0f

where can I buy them
3rd page of the review; Acoustifan in detail, where to buy link.
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Old 12th January 2006, 01:46   #32
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Default decibel meter

Quote:
Originally posted by jmke
I got it off eBay from a wholesale in China;
do you still have the details? or do you know of any similar devices more easily obtained?
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Old 12th January 2006, 01:57   #33
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okay, thanks for pushing me with this I've been going through the box information and found something more

this is the one, exactly it: http://www.arco-meter.com/product_sh...type=45&id=347

that's the ONLY site with any info and they are the makers of the products, so I'm guessing they only sell localy in China?

found one on Ebay (search for "AR-824") www.ebay.com


Quote:
You are buying one BRAND NEW - Digital Sound Level Decibel Meter AR-824.

This is a full featured decibel meter designed to measure sound pressure levels in a given area. Accuracy is +/- 1.5%. Powered by 4 "AA" batteries (included with your meter). Can also be 6V DC powered (NOT INCLUDED). Tripod mounting screw on the back of the unit. Meter measures 10 inches long x 2.8 inches wide x 1.4 inches high. Weight, including batteries: 10.58 ounces. Includes black plastic carrying case , black windscreen and the aforementioned 4 "AA" alkaline batteries

This is not a refurbished unit.

IEC651& ANSI S1.4 compliant. Use this meter to measure workplace noise levels for OSHA compliance. Meter the loudness of your computer fans. Just HOW noisy ARE your neighbor's parties? :-) The possibilities are endless. An excellent unit. Made in Hong Kong. CE certified. . Complete specs are listed below. Guaranteed not DOA. Money back if not satisfied.
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Old 12th January 2006, 01:59   #34
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specs:
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Old 12th January 2006, 02:09   #35
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Default sound meter

awesome!
thanks for all the info.
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Old 12th January 2006, 02:28   #36
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this one looks interesting if you look at the specs

http://www.thermaltake.com/2005/dcfa...2330/a2330.htm

54CFM/16dBA
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Old 12th January 2006, 02:30   #37
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Look again at sleeve bearing used, another hot topic to many who swear ball-bearing is the only way.
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Old 12th January 2006, 02:37   #38
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a quick google/hwfaq search:

at low speed:
Sleeve = more silent
http://www.currentsolutions.com/know...sleevefans.htm (that one comes from HWFaq.be )


" It's accepted that ball bearings produce more noise then sleeve bearings - 1 to 3 dBA according to some sources - but the differences are rarely noticeable during their typical roles in cooling fans"
http://www.frostytech.com/articleview.cfm?articleID=193


will look further tomorrow
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Old 12th January 2006, 02:40   #39
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Sleeve bearing always run quieter than ball bearing due to lesser contact area. Ball bearings are chosen for high load apps (PSI), similar to Alternators in car where the tension of the driving belt exert force on the bearing; ball bearing is used. While the back of the alternator where no tension is exerted, sleeve bearing is used. Unfortunately, not many PC users have mechanical aptitude and sold by manufacturers.

Many argue bear bearing will last longer than sleeve; yes, depends on the apps.

Often times, reviewers are the indirect customers; manufacturers are pushing out products that will meet all customers' want. In the past 6 years, many product review sites surfaced. Most are run by young PC enthusiasts in their late teens and early 20's. Few are equiped with Electrical, Computer Science, Mechanical, or Science academic, they gain "experience" by using/tweaking whatever came alone. Board makers, memory houses, CPU heatsink, water cooling devices, weired looking cases are out to capture some of the needed money from the young audiences. Today, low noise becomes the must have for a PC, while the opposite end of the spectrum in load music is pleasing to their ears. dBA specs that are so unreal are being published in the marketing brochure. Holy cow, people believe it.

Some will Google to find some truth to the matters; others will go around repeating what the manufacturers wish them to. Noise does make money; it's been that way for many years ......
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Old 12th January 2006, 08:14   #40
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hum, guys its a 13cm fan, not a 120mm
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