Whats that dreadful noise??

[exxi]

I noticed that when I am calling someone that means having the display really close to my ear and the display is on, I hear a ultra high frequency noise similar to the one that old televisions produce. It is quite disturbing. I would like to ask if anyone has a similar sensation with his prophet. Try to hold the display against your ear while the device is on. Do you hear anything like that? thanks!!!!

Very Interesting fact:

If i overclock the device to 216 and above, the sound vanishes. if i underclock it the sound gets deeper and louder.
What the deal with overclocking?
Did it damage the device?

[marka2k]

Nope

[exxi]

thanks for the quick feedback but listen closely, i Believe that this noise exists in every unit.. maybe ??

[marka2k]

Nope just tried, don't think it matters but I do have a Qtek S200 with the latest Dopod WWE ROM loaded.

[exxi]

thanks for the try, I am very suspicious that the overclocking of the device to 216 MHZ caused this damage. If i clock it down to 180 it starts making this noise. WHAT HAVE I DONE!!!!

[kta]

thanks for the try, I am very suspicious that the overclocking of the device to 216 MHZ caused this damage. If i clock it down to 180 it starts making this noise. WHAT HAVE I DONE!!!!

It's highly unlikely that overclocking has caused this problem. You have surreal hearing abilities maybe? :D

[alxander13]

yes, there is always a high pitched noise whenever the display is on from the very begining... device is a dopod pro 818 HK version. A rom change (x-vendor) did not make a difference. still there today
regards, Alex :?

[DBZero]

I can hear it too... NOT happy with this! :evil:

[slvrbllt]

Ehi guys,

You're dealing with devices working at high clock frequencies ! That noise is quite normal... I can hear it even getting my wireless mouse close to my ear... Nonetheless I can understand it could be annoying if occurring on a phone device...

My 2 cents.

[m444rcus]

I think that it's the screen that makes the noise. I have a screen off key assigned to the memo key and the noise stops when the screen turns off... I use it all the time if I am making a long call...

M

[lutzs]

I have this sound on the backside of my display, when i open my Wizard! Seems that it is the display or digitizer or whatever

[alxander13]

Overclocking mine to 228 gets rid of the high pitched sound :?:

[Ahjetztja]

Hi,

it seems that the noise is produced by a defective electric part of the display. It is not the effect of overclocking. On the contrary overclocking is the solution. If you overlock the unit (or underclock it, if you're in doubt) the broken part will not get in resonance and thus will not produce any noise.

I had the same problem with my Palm Tungsten and overclocking was the solution. On the Tungsten it was definitely a problem of cheap displays.

Keep quiet, just overclock.

greetings,
Ahjetztja

[m444rcus]

It's not faulty, it's what this type of screen does. Google it and you'll see. If you can only hear it when the phone is close then it is fine, if not, then maybe try to return the unit.

The reason why some people cannot hear it might be down to the fact that as you get older the highest frequency you can hear drops off. Try it with some older people... it's a bit odd that you end up hearing something that others cannot.

If it's annoying, over clock it or use the screen off setup like I mentioned.

M

[Ahjetztja]

Hi,

It's not faulty, it's what this type of screen does.
No, making noise is definitely not a normal behaviour of lc-displays. My Neo does not (yet?) have that problem. That special part is faulty and there are chances that the sound will get louder and louder. That is how my palm tungsten behaved. It seems that history is repeating.

The reason why some people cannot hear it might be down to the fact that as you get older the highest frequency you can hear drops off. Try it with some older people... it's a bit odd that you end up hearing something that others cannot.
You are right, hearing gets weaker while people get older. But this has nothing to do with that special problem. My hearing is excellent and I could clearly hear the noise produced by the display of my tungsten, that started after three months. No noise yet with my Neo.

grettings,
Ahjetztja

[m444rcus]

Anyway, Google the problem and you'll see that lots and lots of people are asking why their screen whistles... Mine whistles, but only slightly. I think it is down to the screen and not a problem at all.

It's not just Windows phones...
http://forum.brighthand.com/showthread.php?t=221912

And also this thread suggests it's the touch screen side of things.
.http://www.modaco.com/index.php?s=295c132ca13e886d0443a9c5ab275223&showtopic=227971&pid=733631&st=40&#entry733631

You missed my point with regards to the drop off of hearing. I was pointing out that people lose their ability to hear such high pitched sounds as they get older. This could explain why one person on the forum says he can hear something and the next person cannot.

What is this 'special' thing you keep talking about.

M

[exxi]

Here is the deal. I called the o2 XDA support hotline and I was told that this sound is produced by a faulty part in the display (some kind of transistor) and that if the sounds is hearable even if the device is not held close to the ear I should return it under warranty. In my case, i can hear the noise when I work at night and everything is quiet which is VERY annoying. I decided to return it and get an exchange unit.

Indeed, if I overclocked the device to 216 the noise would vanish eventually but I am not willing to have a constantly overclocked device or any kind of obligatory change. I can promise you that this noise is not standard for the neo because I testet it with more than 3 devices of friends.

I really hope that overclocking did not cause this harm else I will not overclock it anymore even though i really want it.

[m444rcus]

I guess that all devices* cannot be faulty though....?

*all brands/phone etc that have a whine

[Ahjetztja]

Anyway, Google the problem and you'll see that lots and lots of people are asking why their screen whistles... Mine whistles, but only slightly. I think it is down to the screen and not a problem at all.
There may be many people that have this sound, but you can not draw a conclusion about the percentage. If you search for a problem, the results suggest that the problem is bigger than it is in fact. That is because people without that problem usually won't tell others in a forum.

You missed my point with regards to the drop off of hearing. I was pointing out that people lose their ability to hear such high pitched sounds as they get older.
Once again: you are right, but it's irrelevant. As I already mentionend, my hearing is excellent and I could hear the sound with my palm and some (not all) other PocketPCs. But as for my XDA Neo there is no sound.


What is this 'special' thing you keep talking about.

According to my research it is likely to be a coil that is not well mounted. Have a look at this german posting concerning the palm:
http://www.nexave.de/forum/thread.php?postid=171540#post171540

Edit:
Or read what the hotline said to threadstarter exxi (german xda-forum):
http://xda-zone.de/thread.php?id=10112&start=16

greetings,
Ahjetztja

[m444rcus]

Where in that quote did I draw a percentage about how many people have that sound? I merely pointed out that there are many people who are questioning why their screen makes a noise.

You mention about people report problems far more than if there is none, I agree. But you need to take into account that people are asking the question across phone and phone platforms and about laptops. Therefore it is okay to assume that there some reason why these screen make a whine.

Granted your whine (your phone that is) may be greater than the one that I can hear when my ear is very close. The whine I hear is very high pitched and stops when I turn the screen off. It's not got louder, it's not changed due to over clocking and returning the speed to its original speed. Therefore are we infact hearing two different things? Who knows, just stop miss-quoting me and making out that you are correct. I am merely putting forward more evidence as to what the whine is and that it's not limited to these phones.

Still missing the point about the hearing bit and it is relevant as I was talking about everyone, not just you with super hearing (notice in my previous quote I said 'people' not you), marka2k said that they could not hear anything... so it may or may not be faluty or they might not be able to hear a high pitched sound anymore (sorry marka2k if you can :D )

As for the research (dont you mean you googled?), they would be in German... cannot be arsed to translate the page as I feel I must tell you again. I was only stating a fact that people are questioning why there screen on their product (phones, laptops, tv) make a whining noise!

If your phone is faulty, fix it or return it to the manufacturer or sell it, or throw it in the bin and buy another phone that does not whine.

[victoradjei]

This is noise is a common problem on the Atom, and has been discussed without any solution except to return for replacement. Yet some find it on second and even third phones :twisted:

Are the phone manufacturers sourcing from the same place? What is the long-term effect on users? Nuking the brains :?: :P
Victor[/b]

[Ahjetztja]

Where in that quote did I draw a percentage about how many people have that sound?Here:I think it is down to the screen and not a problem at all.That sounds as if 100% of those display are producing this sound and one just has to live with it. I disagree with that conclusion. If it is not what you wanted to say then I am sorry for that misunderstanding.

Still missing the point about the hearing bit and it is relevant as I was talking about everyone, not just you with super hearingNo need to get offensive. Hearing is not relevant in this case, because there is at least one person that is able to hear such high-frequency-noises, that has got this device and that is not hearing any noise. This person is me. So the conclusion must be: This noise is not normal.

they would be in German... cannot be arsed to translate the page as I feel I must tell you again.Sorry for that, I assumed you speak german or are at least willing to use babelfish. exxi wrote in the german forum that the official support told him: coil defective, please return device.

But you could have read that also in his/her post above:I called the o2 XDA support hotline and I was told that this sound is produced by a faulty part in the display

As for the research (dont you mean you googled?)No, if I want to say google, I simply do. Once again: No need to get offensive. Researching in this case meant looking through technical documents, opening a defective pocket-pc and examine the touchscreen (finding that coil) and at last using different programs to over- and underclock different devices that produces that sound.

What are you doing to get some light into this problem?

I was only stating a fact that people are questioning why there screen on their product (phones, laptops, tv) make a whining noise!And the answer is: device is defective or has a cheap display/touchscreen built in. As for the palm there were two different touchscreen-manufactures. One type produced the noise (frequently) the other didn't.

If your phone is faulty, fix it or return it to the manufacturer or sell it, or throw it in the bin and buy another phone that does not whine.My prophet DOES NOT produce that sound and I am very happy with this fact, as it obviously could produce it (like exxi's device does). But I have other devices that showed the same symptoms: palm tungsten (very loud), hp-pocketpc (medium). Devices of mine that don't produce any noise: palm 505, Dell pocket-pc, SDA II, IBM-Laptop and about half a dozen of flatscreens. This leads me to the conclusion: There are better displays in the world, there are cheaper ones and there are defective ones. And it has most probably nothing to do with overclocking.

greetings,
Ahjetztja

[moghisi101]

The screen can make this noise. A lot of electrical equipment with small LCD screens do. Even my Logitech Harmony 885 does!? It's not a big deal

That sound can caused by the overclocking. The processor or memory is most likely cause. It can happen in standard PCs as well.

[m444rcus]

My God, how much of an arse are you Ahjetztja? You need to lighten up and not dissect everything that I write, it's really creepy. You know you could just accept that other people have different views and theories on things. Quote this, quote that, how anal is that? As moghisi101 says, a lot of electrical items with small screens make this noise. I can point you in the direction of a forum I read where there are pages of people discussing their large LCD TV screens that emit a high pitched whining noise... Sony ones, not cheap you know? (and all the people in that forum cannot have fault Sony screens)

The original post asked about a high pitched whine when put close to the ear when making a call. Other people here think it exists in every unit (exxi's post) I do too, the noise I hear cannot be heard unless the phone is up to the ear, which is what the original poster was talking about... If you know of some phones that emit a more annoying high pitched whine that is more audible from further away then fair enough.

Btw you miss quoted me again on your last post... stop doing that.

You asked what I was doing to shed some light onto the subject. Can you not read? (yes that's personal, when you get all creepy dissecting my posts like that) I've put forward many great :D ideas and links, where as you go straight in and state it must be due to a faulty part. Mine makes a noise, but after researching what it could be using Google I think it is operating just fine.


So in summary:

You're (Ahjetztja) getting creepy, please stop it
My phone makes a high pitched noise when held close to my ear but I don't think it's faulty
Other peoples phones make this noise when held close to their ear
England to win the world cup (well we can dream :D)
You (Ahjetztja) like misquoting me
If it's faulty, do something about it or find out which phones are prone to making this noise and don't buy those ones
Take Ahjetztja's conclusion by not buying a phone that has a cheap screen that emits a high pitched noise, in fact buy the same phone as him
Don't use Babe fish, use Google page translator, it's great


So exxi, enough of that cr@p, is the sound only audible when the phone is held close to your ear like mine?

[fluffcat1]

Hello,

I and others have this problems on ( some) magicians. I don't have a prophet yet to tell, but my noise goes away if I turn the backlight off with the screen still on with the magician screen that does this. Changing the screen causes the sound to dissappear. I do not think it is a voltage invertor issue with the backlight as most recent HTC devices use low voltage illumination, but it would seem for me with 1 magician the screen is the root cause.

There would appear to be two different LCM possible in the Prophet. Perhaps people can take part in this poll and comment whether they have the noise or not?

http://www.modaco.com/index.php?showtopic=241120&hl=

It might be interesting to see if there is any correlation.

Richard

[Ahjetztja]

My God, how much of an arse are you Ahjetztja?Excellent question, you win.

@fluffcat1
No noise with my Neo and "when I look at a very shallow angle it all goes dark".

greetings,
Ahjetztja

[dimushor]

so you guys are saying that overclocking would solve this? for instance, when i overclocked my wizard, i remember exactly that it was making that noise. so, probably this is not the solution :shock:

[exxi]

The overclocking indeed works, If you clock it to 216 for example the noise vanishes completely. To answer the other question about if the noise is only audible if held close to the hear.
The noise is clearly audible at close range to the ear and also from a distance of up to 10 centimeters. I decided to return the phone for an exchange which was confirmed by o2 as a legit reason to claim substitution.
If the noise is really weak you should keep the device in my opinion but if it starts annoying you, return, wait no longer.

If you underclock the device the noise changes into a darker one.

[khendar]

I dont know if this is relevant, but this ocurrence is often associated with failed or failing electronic components, commonly is capacitors. When they start to fail, as was the case in many PC motherboards a couple of years ago, they start to whine and bulge at the top. Eventually they split and spit out electrolytic fluid.

Not sure whether this is what is happening in these devices, but might be worth looking into.

[exxi]

any more ideas?? i have a new device now and the sound is NOT there, i am sure of that.

I really want to overclock again but I am scared, any advice ??

[bloney]

No, making noise is definitely not a normal behaviour of lc-displays.
Ahjetztja

I believe the backlight needs a high voltage supply and the invertor circuit used to generate the high voltage uses inductors which will vibrate to an extent. Perhaps a derivative of the clock is used for the switch mode supply and ths is why a change in clock frequency could cause/cure the problem.

Hope this helps

Bloney

[Ahjetztja]

any more ideas?? i have a new device now and the sound is NOT there, i am sure of that.So it seems that noise is not normal for those displays. Please have a look at:

http://www.modaco.com/index.php?showtopic=241036

and tell us, what your display looks like. There are at least two types of display built in the prophet as the link above shows clearly. Maybe there is a connection between the type of display and the tendency to make noise.

I really want to overclock again but I am scared, any advice ??What is your problem? You did succeed in returning your first device as faulty, why would the shop refuse to take it back a second time? So my advice is: overclock and be happy.

If you do want to find out what is going on, then instead you better do not overclock. Just please wait and see if the noise comes up. In this case you will know that overclocking has nothing to do with the noise. The downside is that if the display will stay calm for ever, then you are not wiser than now.

greetings,
Ahjetztja

[dimushor]

no, overclocking does not help. i keep it overclocked at 252Mhz and it wistles in my ear like a devil. :twisted:

[Ahjetztja]

I believe the backlight needs a high voltage supply and the invertor circuit used to generate the high voltage uses inductors which will vibrate to an extent.
I totally agree with you, that is my state of knowledge too. But as fluffcat1 says:
I do not think it is a voltage invertor issue with the backlight as most recent HTC devices use low voltage illumination
Maybe there is an electronic technician who could tell us more. So that all the people with noisy devices will get a solid reason to bring them back to the shop as being faulty.

greetings,
Ahjetztja

[Ahjetztja]

Hi,

@dimushor
exxi stated that in his/her case overclocking calmed the device. Your experiences fit perfectly in my theory that the noise is a problem of a faulty part that gets in resonance with the case. There is no fixed frequency that "causes" those resonances. It may be the standard 185 MHz, it may be a higher or lower frequency. So some people will experience that overclocking is a problem, while for others it is the cure.

What happens if you underclock your device?

greetings,
Ahjetztja

[dimushor]

i don't want ro underclock my device. :-) probably i have to live with this noise

[exxi]

in my case underclocking made the noise even louder of the time being.

[zaitsman]

Hey, my I-mate JAMin doesn't have any sound. However, i used to have it on Roverpc S2(Lenovo Et560 or 960 - the big PHONE looking one) when i had that one a couple of years ago. It's probably faulty screen.