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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Sat Jul 28, 2012 4:39 am 
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Joined: Fri May 06, 2005 1:44 pm
Posts: 114
Location: Cape Town
Anyone with experience\input on HP ZR2440w.


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Fri Sep 14, 2012 8:50 am 
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Joined: Fri Sep 14, 2012 8:36 am
Posts: 2
No, but I have a ZR2740W. This is completely silent at any brightness setting. I don't know if this applies to the 2440 as well though. A potentially important difference is that the ZR2740W does not use PWM to adjust the screen brightness - I don't know if the 2440 is the same, but it's apparently rare to find screens that don't use PWM (pulse width modulation is used to rapidly turn the backlight on/off which can result in audible noise).

I bought the 2740 because it doesn't use PWM to dim the backlight and I thought maybe this would eliminate annoying hum from the screen. Seems I was right, although it's also possible I just got lucky with mine - would be really interested to hear from other people with non-PWM screens.

The new Samsung series 9 (S27B970D) apparently doesn't use PWM either by the way (PWM is something tft central have started testing for as standard in their reviews, so if PWM results in a quiet screen that info could really help when shopping around - it's not something manufacturers list in their specs, but it can be tested for).


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Fri Nov 09, 2012 3:19 am 
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Joined: Thu Dec 09, 2010 9:43 am
Posts: 9
Can anyone confirm U2713HM buzzing noise?

related: http://forums.overclockers.co.uk/showth ... t=18455034 and http://www.amazon.com/Dell-U2713HM-2560 ... ewpoints=1


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Fri Nov 09, 2012 5:12 am 
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I ended up ditching my Dell 20" 2007FP's due to a constant high pitched whine I could never get rid of after slathering nail polish over most components on the inverter.

My Dell 3007WFP-HC is getting less use due to the CCFL inverter buzzing on acceptable brightness levels (mostly goes away at 100%).

I'm now on a Yamakasi Catleap 27" LED backlit monitor that only has a noticeable noise with white backgrounds. This one is supposedly an easy nail polish fix but I just haven't gotten around to opening it up yet. Benefits of this monitor, slightly higher PPI, no warmup time for accurate colours, almost dead silent, barely heats up the office.

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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Sat Dec 01, 2012 10:26 am 
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Joined: Sat Dec 01, 2012 10:15 am
Posts: 1
Asus VW223D It has worked just fine for four year. Restarted my laptop, earlier today, to whom it was connected as external monitor for the same period of time. I kept everything on 24/7 , BUT as i said, i restarted laptop and ta dam! No image, only little blue diode on on/of button of monitor blipping and OF COURSE a very very silent whine from behind of the monitor. It is coming from behind near the upper edge and little bit on the right when you turn backside to the front. After little while even a little blue lamp stopped.

I think it's the end of it...


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Wed Dec 12, 2012 2:42 pm 
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Joined: Sun Mar 14, 2004 11:40 am
Posts: 228
I can confirm the buzzing with the u2713hm. Otherwise it's a BRILLIANT monitor - no PWM backlight, tons of inputs, beautiful display, light AG coating, regular gamut.

<sigh>

I'm on my 3rd, and they all buzz.


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Sun Feb 10, 2013 4:40 pm 
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Joined: Mon May 12, 2003 3:52 pm
Posts: 239
Location: UK
I have a NEC Spectraview PA271W which has an annoyingly audible high pitched hum. My NEC2690 had a hum too, though not my NEC2490/2. I've been putting up with the hum because the display is wonderful to work with but it's beginning to get to me.

Does anyone know what causes the hum and whether anything can be done about it? Does anyone know of a colour accurate 27inch display that never hums?

Thanks.


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Sun Feb 10, 2013 5:05 pm 
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Joined: Sat Aug 27, 2005 1:31 pm
Posts: 18
Location: GVA, Canada
David Cole wrote:
Does anyone know what causes the hum and whether anything can be done about it?

Try changing brightness level. If that doesn't help, try changing contrast level next.

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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Sun Feb 10, 2013 5:10 pm 
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Joined: Mon May 12, 2003 3:52 pm
Posts: 239
Location: UK
Thanks very much - that was the answer. When I increase the brightness to 120cd/m2 the buzz goes completely. Now I need to try different calibrations in small increments below 120 to see how close I can get to 80cd/m2 without the buzz becoming too intrusive. It's a bit bright at the moment. But it's great to have a solution. Thanks again.

PS - this 120cd/m2 is beginning to fry my eyeballs...

PPS - didn't last, hum's back even at 120cd/m2.


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Mon Mar 04, 2013 2:21 pm 
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Joined: Mon Mar 04, 2013 2:10 pm
Posts: 1
Fujitsu Siemens
Scaleoview L22W1GT or D22W1GT
Dropped the brightness to improve in game visuals, noticed whine.
Can hear whine between 8% and 93% increases toward the middle of the range so stuck with very dim or over bright.
Doesn't respond to changes in contrast or colour temperature.
Settled on Warm, Brightness 8%, Contrast 75%.

Thanks for this thread, will use it next time I'm looking for a screen!


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Wed Mar 06, 2013 7:25 pm 
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Joined: Wed Feb 27, 2013 12:00 pm
Posts: 2
AOC 12367f

Just took delivery of this today. Quiet on all brightness settings.

With my ear touching the screen (the top of my ear is in contact with the display, to be precise) there is a faint medium frequency hum. Inaudible at >5-10cm away.

Is this as good as it gets?


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Wed Mar 06, 2013 7:28 pm 
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Joined: Wed Feb 27, 2013 12:00 pm
Posts: 2
Samsung 2333HD

Audible hum at normal sitting distance at all brightness settings below 100%.


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Tue Jun 25, 2013 6:15 am 
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Joined: Tue Oct 05, 2004 1:59 am
Posts: 1630
Location: Portugal
I've got a U2312HM (Rev. A06) as a replacement for my malfunctioning U2311H. As far as I can tell, it's silent. I'm using it a 7 brightness and haven't heard anything.

Either the A06 revision fixed the issue or it went away (factory menu shows 650 hours of use so mine is a refurb).

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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Sun Aug 25, 2013 11:43 am 
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Joined: Sat Sep 26, 2009 5:34 pm
Posts: 14
Location: norway
Asus VE247H, completely silent at any brightness level.


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Tue Aug 27, 2013 1:56 pm 
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Joined: Sun Sep 05, 2004 1:51 pm
Posts: 685
Location: Gefle, Sweden
I was glad, if not surprised, to verify that the 27" BenQ GW2760HS is completely quiet at any brightness setting. Being a screen that actually does not use PWM for regulating the light I guess there should not be much risk of noise, but anyway it's indeed silent to my ears. The flicker free picture is pretty "quiet" too. It's a beauty in its price range.

Oh, and the fact that I listened for noise before checking for damaged pixels is telling of how far gone one might be in the quest for the quiet grail. :lol:

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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Wed Jan 29, 2014 12:31 pm 
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Joined: Sat Sep 26, 2009 5:34 pm
Posts: 14
Location: norway
Asus VS24AHL is completely silent at all brightness settings. No buzzing, no hum.
Its the same monitor as Asus VS24AH , only difference is the stand.


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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Sun Mar 09, 2014 2:37 am 
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Joined: Tue Aug 31, 2010 6:48 pm
Posts: 23
Location: Outside the box
Dell U2414H:
No PWM and utterly silent. Just bought it, and as the TFT Central review stated it, it does not emit any sound at any brightness. (It is a relief after having a Samsung F2380 that was only quiet at 100%)

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 Post subject: Re: Quiet / Noisy Monitor Survey
PostPosted: Wed Jul 16, 2014 11:49 pm 
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Joined: Thu May 25, 2006 1:19 am
Posts: 489
Location: Australia
dell p2214h - silent!

had to drop in to post this :)

it turns out that this new pwm/flicker free backlighting thing may very well be our salvation.


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