120mm Fan Roundup - Page 4

jmke · 11th January 2006, 19:21

Quote:

Originally posted by kr15t0f

where can I buy them

3rd page of the review; Acoustifan in detail, where to buy link.

12th January 2006, 00:46

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?

jmke · 12th January 2006, 00:57

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.

jmke · 12th January 2006, 00:59

specs:

12th January 2006, 01:09

awesome!
thanks for all the info.

jmke · 12th January 2006, 01:28

this one looks interesting if you look at the specs

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

54CFM/16dBA

Sidney · 12th January 2006, 01:30

Look again at sleeve bearing used, another hot topic to many who swear ball-bearing is the only way.

jmke · 12th January 2006, 01:37

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

Sidney · 12th January 2006, 01:40

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 ......

12th January 2006, 07:14

hum, guys its a 13cm fan, not a 120mm

12th January 2006, 00:59	#34
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,013	specs: __________________

12th January 2006, 01:09	#35
markcox Posts: n/a	sound meter awesome! thanks for all the info.

12th January 2006, 01:28	#36
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,013	this one looks interesting if you look at the specs http://www.thermaltake.com/2005/dcfa...2330/a2330.htm 54CFM/16dBA __________________

12th January 2006, 01:30	#37
Sidney Member Join Date: Mar 2004 Posts: 15,738	Look again at sleeve bearing used, another hot topic to many who swear ball-bearing is the only way. __________________ lazyman Opteron 165 (2) @2.85 1.42 vcore AMD Stock HSF + Chill Vent II

12th January 2006, 01:37	#38
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,013	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 __________________

12th January 2006, 01:40	#39
Sidney Member Join Date: Mar 2004 Posts: 15,738	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 ...... __________________ lazyman Opteron 165 (2) @2.85 1.42 vcore AMD Stock HSF + Chill Vent II

12th January 2006, 07:14	#40
Gothrek Posts: n/a	hum, guys its a 13cm fan, not a 120mm

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
120mm Fan Roundup - 25 Models Compared	jmke	WebNews	0	22nd February 2010 12:48
120mm Fan Roundup ~ 11 Fans Tested (no noise tests)	jmke	WebNews	0	20th January 2010 08:21
120mm Fan Roundup - 35 Models Compared	jmke	Articles & Howto's	3	15th February 2009 22:26
PR: Scythe Kaze Maru 140mm Case Fan With 120mm Mounting Holes	jmke	WebNews	0	30th August 2008 09:22
New Concept Case Fan?! - Slip Stream 120mm Case Fans	Sidney	WebNews	0	15th November 2007 01:42
120mm Fan Roundup	jmke	WebNews	0	5th December 2006 16:46
120mm Fan Roundup: 17 Fans Compared	jmke	Articles & Howto's	29	16th April 2006 11:59
12-Way 120mm Fan Roundup	jmke	WebNews	18	31st March 2006 20:10
120MM Fan roundup part 2	jmke	Articles & Howto's	13	16th March 2006 16:40
19-Way 120mm Fan Roundup	jmke	WebNews	0	6th March 2006 14:49