Hello Everyone,
Is anyone know to decrease the voltage of the motor that make vibration in the phone. My phone always on vibration but its vibration sound becomes too high specially in quite public places like libaray and class room. Please reply. Thank you
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Hi guys,
I've found a very interesting sound effect on my O2 XDA Mini (=Magician). I've been having the phone for a few days only, but right from the very first calls I noticed that the speaker creates a very high frequency continuous beep-sound, not loud of course, but crazy high, something like the well-known side effect of the old CRT TVs. At first I thought it is produced during a conversation. Then today, I held my phone to my ears without any calls, and guess what: the beep is there. :shock: It's produced always!
I started to look around, and had a hunch that the LCD backlight can be the problem. I played a little with the backlight setting and found that I was right, the sound is poduced only when the light is set to low. It's loudest at the first notch of the light slider, and gets more and more quiet as you set the backlight higher.
Now I wonder if it's a special problem with my phone (like some bad quality filtering somewhere in the power electronics of the backlight system) or if it is the same with your devices.
Please try it and post your comments. Listen closely! And try both ears (not kidding), the sound is very quiet and very high in frequency, so your ears may not be up to the task to pick it.
Have to be honest I can't get a quite second at the moment but I'm pretty sure I've noticed this noise before as well. Another noise which can be irritating is the GSM radio module and it's intermitting buzzing (a quiet version of what you hear when unshielded speakers pick up your signal).
So basically I'm not sure but I think it's a generic issue with the backlight
Hi,
I found that too....
it's quite irritating as it looks like an old TV turned on.
I hope that won't be a problem to our ear in the future
After about a week of usage (no problems at all), a very high pitch tone is now heard whenever the display is on. If the display is turned off, everything is nice and silent.
This tone is (pure guess here) about 10-12.000 hertz and very annoying since you are holding the phone to your ear during calls. It can be heard from about 5 meters away in a silent room.
It does not matter if the sound volume is off, on vibrate or on. It does not matter if the display backlight is on or off or what level the light is at. A hard-reset didn't do anything either. It also does not matter if WiFi, Bluetooth of the phone radio is on or off.
Any guesses? Should I just return it for repairs or does someone have a fix?
Best regards,
- Soren
It is usually the backlight lamp emits this buzz on some PPC...
But u mention you hear this even the backlight is off...
That's weird... but u need to exchange it back ..looks like HW issue to me
Hi Soren,
Definatly a hardware issue - I'd send it back for repair.
It sounds like the PWM (pulse width modulator) circuit has gone funny. This circuit produces the required -10v or so the display requires from the +3v battery. It's quite common to hear a very low buz at the frequency you mention on most phones.
Gav
I recently bought an EM-ONE here in Japan and so far I am quite pleased with the device. It has a few shortcomings, but nothing too serious apart from one bug that is really annoying: When the device is turned on there is constant white and high frequency noise coming from the speaker. Even if I mute them the noise is still there and quite perceptible when the volume is tuned low. This turns out really bad when using the device's microphone as the noice gets recorded as well which puts a lot of static on the line. My question would be if there is anyone else sharing this problem (maybe on another device) and if there is anything I can do about it. Any help will be greatly appreciated!
HI there guys.
Brand new to this forum.
I've searched for days and I'm unable to find a solution.
I'm experiencing a crackling or a distortion on phone calls at certain volumes. I noticed it with certain pitches in peoples voices it would cause a vibration in the ear speaker and some distortion in the sound. Kind of like the speaker is being over driven or has too much power going to it. It usually goes away if I turn the volume almost all the way down, but this is obviously not a practical option since I'm not always making phone calls in a dead silent room. The speaker phone works fine. This only happens when I'm using the earpiece. Is this normal? Is it related to the camera autofocus sensor rattle? Are the sound vibrations from a person's voice enough to set off the rattle? It's really annoying as I tend to make phone calls a lot and I don't like using speaker phone or a headset. Does anyone else have this problem?
From what I can tell, it happened and was normal in the S4. (http://forum.xda-developers.com/showthread.php?t=2280930).
Please help. Im deciding if i need to return it.
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fffft said:
It's too bad that you didn't describe it in more detail.. i.e. give us steps to replicate it. A recording of the distortion would have been helpful too. I haven't noticed what you describe but it sounds like the gain or auto gain is too high and your earpiece speaker is being overdriven.
There is a gain setting in the service mode menu but first you need to distinguish an app issue or possibly damaged speaker before messing around in the hidden settings. See if you can find an audio app that will give you a wider adjustment range for your system volume and gain.,
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Thank you for the reply.
If you go into the service menu, the go into the low frequency test. At 100hz and 200 hz there is a little bit of buzz in the headset reciever unless you really push it against your face (which i assume kind of tightens the spaces in the plastic and prevents whatever vibration in the speaker is occuring).
Hmm.. the vibration is akin to as if you were speaking into some cellophane wrap; like some film (maybe for waterproofing) is covering the speaker.
Oh. It's also worth noting that I cannot replicate the issue on Skype or Viber. Those sound crystal clear.
Bump. Anyone?
Hi,
I love my Note FE but it has this one very annoying thing, the vibration engine seems crazy. Even on the lowest setting the phone looks like is going to break into pieces when vibrating. The noise it makes on my desk is horrendous.
Anyone noticed the same issue or do I have a defective unit?