Same here, however, the static sound is rather quiet and stops about 10 secs after any audio was played through the display's speakers.
My best guess: it's basically the "static hiss" of the speakers and amplifier built into the display combined with measures to save power. Once the display detects any audio signal is "sent" to its speakers, it powers up the amp and speakers (thus adding a low-level "static hiss" to the sound), plays the sound and - after the audio signal has stopped - "waits" for another few seconds before powering down the amp and speakers. (Just like any recent Apple laptop does.)
However, I do agree that the "static hiss" is quite pronounced (i. e. audible) for such a piece of advanced technology.
I have a MBP 2011 and the TB display. Have noticed static noise just in the 2nd week of use, and it is doing it more and more each day. Doesn't matter what I do. It can even be up and running with no programs active, and it will make the hissing sound for about 30 seconds at apparent random times. I've noticed a faint electronic 'pop' just as the hissing starts. I've only got a few days, so I wonder if I should return this thing, or just get my money back and go back to the Dell monitor I had.
Note: playing any sound does not stop the hissing for me!?
Reading the stuff on here does not make me feel good right now.
Lets see if i can shine some light on this situation. I am a audio/ Producer studio rat, and YES this is a BIG issue. I have a proffesional studio and this new laptop is killer. BUT I can not use it in a proffessional environment b/c this noise is horrendous.
I have come to these conclusions.
1. there is always a very slight noise coming from the mini jack port on any laptop.
2. This noise we are hearing with the thunderbolt port is not slight. As i mentioned above it is "horrendous." big difference
3. The noise happens when plugging in my USB hard-drive that has a power supply. thunderbolt doesnt mattter,lol
4. The noise happens when connecting my new 40" LCD into the thunderbolt port.
My most profound finding is that this appears to happen when the outside(ground) of metal part of the cable even touches the laptop case. This is with both usb and thunderbolt cables. since this is huge. I am going to go to the length of unplugging the ground wire on the circuit board of my tv so it doesn't get fed into the cable and see if that works. lol
I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!I FIXED IT!!!
So my specific problem stemmed from my new TV. I just found an IEC that had a broken ground prong. So when I plugged my TV in with the cord that is not grounded. Viola. NO MOTHER****** NOISE !!! YAY !!!
Furman Elite Power conditioner
Out of the TV via HDMI into the MBP 17 (Quad Thunderbolt v8,3) with the official cord(http://store.apple.com/us/product/H4637ZM/A?fnode=MTY1NDA3Ng)
My sound is through an Apogee Duet. Which connects from the Firewire 800 port.
Then out to the speakers
Note: the Furman, and the Duet did not dampen the "noise" at all. So those are not super special only audio guru tricks here. It should work with anyting. Simple, remove Ground from offending unit.
I am soo excited to share that it was THAT simple, i have yet to completely see how far this trick will go. I still have a usb hard drive that adds noise like crazy. Plus there is still the normal low level digital computer thinking noise that comes out of the "motherboard line out" which seems to be in all laptops still to this day. I guess filtering ground noise is not common practice in our world yet. See thats what I wish would change about the world today. So many people, just doing par. Just enough. Whatever happened to thinking about all the possibilities and making things bullet proof. cummon America.
NE ways. Please report and post back with confirming or denying experiences.
Well Mad sci, interesting to see what fixed your display. I actually went as far as turning off everything in my house - and I mean everything, and plugging the monitor straight into the wall (bypassed any surge protection and such). Nothing else plugged into the computer, just my MBP and the 27" TB Monitor. Static hiss was still there, clear as crud.
I am rather annoyed also that Apple does not call me back as promised on this - have called and talked with too many people so far, and they always states 'will contact engineering and get back to you'. I'm still waiting...
Ozyr, I feel your pain. I have the paper still clipped to my fridge that I got from the genius bar. Dated 18-jun-11. They too told me the same thing. I am waiting my phone call too. Thats why I handle most everything myself. I dont have time to go to the genius bar when these guys are just about as capable as any well read seasoned mac guy. In my situation the only thing they were really capable of doing was replacing. I was offered a new computer bla bla. That wouldnt fix anything, duh. I was in the apple store and tested my setup with a bunch of different computers there. Same issue, (with all the thunderbolt units). its probly because its 1 port with a bunch of different perhipherals going down the same pipe. They are all tied together. Its a hardware issue and Apple probly wont recall, unless we the people make a huge scene, revolt, class action style.
Really though I want one of these thunderbolt HD arrays, but there is no way im gonna be able to tell its noise free until its plugged in with all my equipment. Pain in my rectal cavity.
For now, Find the right power cord. haha I mean make one. Carefully dremel off the ground prong. See if that works. If it doesn't. I still have more ideas.
-Best of luck to ya
Problem now is, it is past my return date. 1st person I talked to said they would extend that, but I have doubts. Also, I really like the display, just not the sound issue. Not sure what to do. Will probably try calling Friday (when I can), and see if they can still allow me to return this thing. Thanks for the words, advice and such. Just wish Apple would acknowledge this TB Display sound issue - and work on a fix. :|
Hello happy that you have found a solution partially to your problem. As for the main problem I did describe at the beginning of this post, yours does not look to be exactly similar, but as you said it is caused by outside devices plugged to your Monitor.
The problem I did describe is not related to anything plugged to the monitor. The hissing sound is perceptible whatever if you have any external devices or not plugged into the TB Display (other than the Thunderbolt wire from the TBD to your laptop, letting it on battery power or not).
I'm not sure if your problem is related or not, but my problem was that is a very perceptible static hissing sound that you can hear while any audio is playing, it also continues for 30 seconds when the audio/video has stop. You can usually reproduce the hissing sound by simply selecting a media in the Finder (like a quicktime movie) and let Finder initiates the Preview in the last column. You can also initiate the problem by simply opening the application FaceTime or iChat. You will hear the static noise for 30 seconds unless you begin using the speakers from those application (then the hissing would be cover by the sound). When I'm talking about a perceptible sound, for sure I mean in quiet environment. This is why most of the poeple did not notice this problem I think, probably using the TBD in less quiet environment.
I never found any solution to my problem, ever after having replace my TBD 4 times (yes 4 times) or having plugged it in a friend house with another laptop. The problem was persisting on each TBD.
I finally did decide to buy a refurbished iMac for $450 more than the display and cannot be more pleased. i synch everything between my MBA and the Mac using iCloud, iTunes Match and Dropbox. This is why I did stop participating here, I lost hope about Apple beign able to fix the problem, at least for this version of the TBD.
I just ran into the same problem the first time I tried using facetime with the TB monitor
I found a solution though, make sure that the sound output in system preferences is set to display audio, if I change it to internal speakers of the MBP or to my USB audio device which I have my speakers hooked to I get the feedback noises as soon as I change it back to dislay audio it goes away even during the facetime call its completly repatitive.
or the other option inside facetime is to change the sound input to the MBP built in but that may not working depending where you have it placed, I didnt try to change it to my line in as I didnt have a microphone near me but I have a feeling that may also work.
not the best solution but at least its a way around it
hopefully there is a fix coming for it though