Constant low rumbling noise on headphone out

There is a continual low distortion noise on my HP DM4 headphone out, which is very annoying when no sound is coming out, and still audible and disruptive when sound is playing.  Is there something I can do about this, or is it a defect that I should get repaired?  Thanks.

The problem seems better when I disable wifi.  Just a muted thump every couple of seconds.  It seems like the audio circuitry isn't properly shielded...

Similar Messages

  • Low frequency buzz on Headphone out p

    when I hook up my stereo input to my sound card Headphone out port I get a low frequency buzz noise. Is there any way to eliminate it's

    dbruchez wrote:
    when I hook up my stereo input to my sound card Headphone out port I get a low frequency buzz noise. Is there any way to eliminate it's
    Use the Headphone-out port for headphones only (use line-out #-3 for feeding external amplifier(s)).
    jutapa

  • Any solution to DVI noise via Headphone out?

    Have posted before but I have a new i7 Macbook Pro 8GB running fine.. and I want to use the Analog/Headphone out to 2 x phono left/right into a USB Soundcard.
    This is fine for recording loops from the Macbook to another editing computer, and the levels were way down at -90.0 which is almost silence.
    I now have a DVI adaptor (apple) from the Macbook Pro to a DVI Dell Monitor fine, and now I have terrible buzzing, earth hum, noise!
    This obviosuly ruins the recording process as I need my 2nd Monitor hooked up to the MBP. After googling this problem, it seems many many users have this same annoying problem and Apple still produce laptops with the noisy analog out?!
    Is there any cure for this?
    I tried to use the headphone out as Digital SPDIF out which is silent, but I can't monitor in the same way via the USB soundcard on the other machine, so that makes that tiresome and awkward. I even bit the bullet and bought a good 'ground loop isolator' to put between the Macbook output lead and the input to the soundcard lead, and that still makes no difference?
    It seems to be the DVI port powering another monitor that causes this. Is there a simple solution to stop the noise?
    Help!

    I am not familiar with the Bumper unit, it seems very low priced, but it would be hard to believe it does not use the standard solution - a transformer, even an inexpensive one.
    In the states, I have used a Radio Shack unit for this problem as an inexpensive solution which appears similar to this Maplin device:
    http://www.maplin.co.uk/ground-loop-isolator-33172
    The gold standard device is probably the Jensen like this:
    http://www.jensen-transformers.com/ci2rr.html
    but it's more like $300USD.
    You may have other problems, and it would be interesting if the Apple Store can solve this for you. Otherwise, I would suggest trying the Maplin unit, and return it if it is no better than the Bumper.

  • High Frequency Noise from Headphones Out Jack

    I have isolated the following issue to audio that is monitored via the headphones output on the back of my iMac:
    I've been encountering a very high-pitched (and at times a cycling through high frequencies) noise when working with headphones to monitor audio. It's not the headphones and the problem is not limited to any single application. The noise is sometimes barely audible, and it comes and goes - but repeatedly and often. Sometimes the frequency of the noise is so high that I can imagine that those with poor or compromised hearing wouldn't even notice it. But the highest frequencies are still detectable - kind of like a faint ringing in the ears or a ringing television set that has its volume turned all the way down.
    I've done everything I can imagine to troubleshoot the problem including asking a Mac genius, but nobody seems to have encountered this before. The noise can be triggered off (not masked) by any other incoming audio, but eventually it reappears. I will be editing a file, the noise will appear, and I can literally silence it for the moment by pressing a volume key or playing back a portion of audio.
    Anyone else experiencing this issue? Is there a fix? I do a lot of audio engineering and this problem is very distracting. I haven't purchased any outboard gear to monitor with yet, so I don't know if I will hear this noise through an external audio interface or not. Thankfully, this noise isn't being recorded to disk. It appears to be a little monster that is haunting only the playback.

    OK, It is very easy to reproduce the problem, just follow this steps:
    (1) Insert any headphones to iMac.
    (2) Do NOT play any iTunes or any application with sound.
    (3) Now, set volume with the volume control keys on your keyboard, set it to the MAX.
    (4) You can keep pressing on the increase volume key and every time you hit the key you should hear a sound.
    Just as when the sound stop, you will hear a high pitch. Keep repeat step 4 and wait a while, then occasionally you will hear a high pitch sound that will last to longer than 30 seconds. The high pitch will be even easier to reproduce if you alternate before decreasing volume and increase volume by 1 level, each time, wait and you will hear the high pitch too.
    This high pitch sound can be heard on external speaker plug into the headphone jacks too.
    BTW, I turned OFF WIFI, Bluetooth, removed all USB devices except keyboard and mouse, adjust monitor brightness, they have no effect on the high pitch, it is still there!
    I am going to call the Apple Care tomorrow. Will keep you guys posted.
    Message was edited by: chienlim

  • X61: Constant low humming noise After using for an hr. or so.

    After using the notebook for an hr. or so, low irritating/humming noise starts that continues without interruption. The noise appears to be not from the HD side, rather from the opposite side.
    Noise continues whether used with battery or power outlet or both.
    Any suggestion and diagnosis would be of great help. Thanks.

    The following is the comment I posted on 9/15.  I have not received any replies so decided to search through other questions and came upon yours.  Have you resolved your humming noise yet?  I would love to know what this annoying sound is and how to get rid of it, if possible. 
    I purchased a Toshiba Satellite L505D-LS5002 laptop recently and am not happy at all with the annoying fan sound I hear for about 15 seconds every 50-60 seconds.  It is too loud to ignore.  I am not a computer "guru" and am just assuming it is the fan.  What else could be making this annoying sound.  It is a sort of humming/whistling  sound that "revs" up for about 15 to 20 seconds and then stops abruptly, only to start up again in about a minute or so.

  • HELP! Weird "Underwater" effect when reducing high and low frequency noise.

    Hi everyone.
    I am in a spot of bother with Soundtrack Pro. I hooked up a reel-to-reel player's audio line out to my PowerBook's line in. Then in Soundtrack Pro, I hit record.
    So everything works out fine, except...
    There is some hissing in the audio file which I can easily remove with the "Reduce Noise..." feature, but there is this low "rumbling" noise in the background. When I try to remove that, the entire song sounds like it was played "underwater". I tried selecting only the low noise, goin to "Process>Set Noise Print" then reducing the noise, and the underwater effect gets worse.
    I need help pronto!
    Thanks

    Hmmm...OK. The hiss is removed, and the underwater effect is elimanated, but how do I get rid of this annoying low rumbling? I tried looking under the Analysis tab and selecting "Power Line Hum" but it couldn't find anything. High Pass Filter and Linear Phase EQ either kill the whole bass frequencies or they make the song sound "Tinny".
    Any advise?
    Thanks

  • Low sound noises

    I hear low sound noises in headphones when I plug them into mini jack output (in iMac 2011). My headphones works correctly (I checked with iPod and phone). How can I resolve this problem?

    i had the same problem with mine, i found that if i go into : control panel - sounds and audio devices - advance ( in device volume) - and mute Auxiliary, the noise sto
    ps.
    hope this might help u

  • HT1349 My computer won't turn on. Makes a low beeping noise that I've never heard but the screen doesn't turn on. The battery ran completely out but I've had it plugged in for 2 hours. Any thoughts?

    I have a MacBook pro. After running the battery down, the computer won't turn on. It seems to cycle on but then makes low beeping noises and the battery indicator light blinks along with the beeps. I've had the computer charging for quite awhile. Any thoughts?
    Jeannepo

    UPDATE:
    My computer now works but still has the loading bar at startup. Here is some advice for other mac users with the same problem. To get the computer to turn on again (but unfortunately still have the loading bar - you will need to fix this problem seperately) follow these instructions:
    Shut down the computer.
    Unplug the computer’s power cord and disconnect peripherals.
    Press and hold the power button for 5 seconds.
    Release the power button.
    Attach the computers power cable.
    Press the power button to turn on the computer.
    This is called a SMC Reset and will hopefully get your computer back up and running (at least for the time being!)
    Good luck to all those iMacers out there!
    SubtleMonster

  • Macbook Pro '08 - noisy headphone out

    Hello - As soon as I got my new pro I have noticed that it makes weird noises through the headphones when listening in iTunes etc. The noises only happen when the song starts playing and for a second afterwards. The noises are like a constant low level static, weird high pitch sounds and glitchy noises. Pretty annoying really. Just wondering if anyone else has this problem and how they're dealing with it.

    I recorded the weird noises: http://www.bluesalamand.de/noise.mov
    What you hear: The System "Pop"-Sound from Mac OS X, played periodically.
    Second 0 till 5: audio out in "sleep mode", silence
    Second 5: First "Pop" played, audio awakes with dull "plopp"
    Then, the "Pop"-Sound is played periodically, the werid noise changes everytime, randomly.
    30 seconds after the last "Pop", the audio out falls to sleep with a dull "plopp" again, then silence.
    This problem is independent of: battery / cable power WiFi / Bluetooth on / off, energy saving mode on / of, system reset. The weird noises are also independent of the current audio volume.
    I now already got two MacBook Pros with the same problem! Why don't the fix it? I think it's a hardware problem, I don't wat for a software update
    Greetings, NueX

  • Mighty Mouse causes electrical noise on headphone socket of Intel iMac!

    Sorry for posting this again (it was originally a reply to another thread). I just felt it warranted some attention.
    Mighty Mouse (and other USB optical mice) cause noise and interference on the headphone port in an Intel Mac!!!
    In the other post it was reported that there was discernible electrical noise and interference when using the headphone port, with echoes, pops and a constant buzz and whine. I really noticed this as well, especially after the impressive noise-free headphone output of the Mac mini I had for 10 days before upgrading to an iMac.
    I noticed that the noise changed from a buzz to whine when I moved and picked up the mouse. I've got my Mighty Mouse plugged into my keyboard. At first I tried unplugging the keyboard from the iMacs USB port and the noise stopped. Then I plugged it back in, and then removed the mouse from the keyboard. The interference stopped. I then tried plugging the mouse directly into the iMac. Again, that horrid buzzing whining noise and echoes. So it is definitely the mouse!
    The noise changes when the mouse's scanning red light switches on and off and during movement.
    I've then tried a second Mighty Mouse, the one I bought for my Mac mini. Same thing. And just now I tried another optical mouse, a mini-notebook one. The noise is even worse! It's quite bizarre as well, the noise changes in pitch the further I move it from the desk surface - its like tuning a radio!
    Am I going to be reduced to plugging in a clunky old USB ball mouse to avoid noise through the headphone port of my 1 day old iMac? Can you actually still buy such a device?
    Actually, can anybody report on whether the Apple wireless Bluetooth mouse causes electrical noise on the headphone port? And is the noise just on the headphone port or on the inbuilt speakers too? And on the headphone port's dual function as optical audio output?
    This is not good. And I'm quite surprised it is something that has been missed by Apple's engineers. Or has it? Is this a known problem? Somebody should have words.
    Can anybody from Apple comment? Do they frequent this place? I hope so.
    20" iMac (Intel)   Mac OS X (10.4.5)  

    Hello, I bought an iMac 20" today and ran into the same problem...and found this conversation (and the original thread) with a search for "iMac headphone jack noisy".
    The problem is painfully audible on a pair of Etymotic Research headphones that I have on loan from a friend. These are designed to fit into your ears with earplugs that seal off the rest of outside sound, so it's practically like having an oscilloscope plugged into your head. Though the Mighty Mouse certainly aggravates the problem with the varying pitches of whine, I have to say it's just a noisy jack when compared with other devices I've plugged the headphones into.
    For instance, my Powerbook G4 has some noise on the headphone jack but it's a soft hiss. There is no variation introduced by plugging in the mighty mouse.
    However, on both the iMac and PowerBook G4 it appears that the electrical gain on the noise in the headphone circuit is completely independent of the volume level. This is not true of the iPod, where if you turn the volume all the way down while no song is playing the jack goes dead quiet. If I'm right that the volume is being done entirely with software on the computers, then I have become curious as to whether there is any way to control the electrical gain of the headphone jack.
    Without such a hardware-level gain control in the iMac or G4, then if your headphones don't take much power to drive...the relative volume of the noise will be greater. So you can make this less noticeable with bigger headphones. I can't hear any of this noise when I'm listening on a pair of bulky AKG studio monitors (which are not particularly shabby in terms of frequency response or audio quality, though the maximum listening volume isn't very good without a headphone amplifier).
    More expense, and hassle, just to work around a
    problem that should have been noticed and rectified
    before Apple released these computers to their eager
    public.
    In Fight Club, the main character faces the grim truth about how his automobile company handles recalls. The financial formula wasn't to recall a car just because they knew it had a fatal flaw, they recalled when the cost of dealing with lawsuits would exceed the cost of performing a recall. A lot of people in business think that way, and it's sad to suspect Apple is in that camp.
    Still, engineering decisions are made within certain specifications and tolerances, and influenced by issues like price. So I accept that Apple cannot anticipate every audiophile application, and that there's a limit to the quality level the consumer interface can ship with. If someone wants better, they can buy a firewire or USB audio interface with higher-quality design.
    The frustrating bit is that the only guideline we are given from Apple to expect on quality is "excellent", "engineered", and "pinnacle of design". Speaker manufacturers publish graphs showing the response of their system, which you can then test your unit against. Where is the noise limit specification for the headphone jack? Are we all stuck making individual appeals?
    Since this problem depends on the headphones, you've got to prove that the headphones you're using are reasonable. Perhaps see if iPod headphones have the problem?
    (Sadly I no longer have iPod headphones with which to test...)
    Vainly crossing fingers for a fix.
    At least at this point, it can pay off to speak up. My PowerBook mentioned above just had its logic board replaced in order to address a terrible whine that happened when the CPU was drawing a middle range of power. I couldn't really reproduce the horrible cases very easily until I finally found others who managed to figure out that the defect was so bad that some systems could play a nearly full volume musical scale on the analog circuitry of the power supply:
    http://arstechnica.com/staff/fatbits.ars/2006/3/4/3059
    Once I could demonstrate it, they fixed it. But the problem had been there since I bought the machine, and made it nearly unusable at times.
    iMac 20" Core Duo   Mac OS X (10.4.6)   2.0 GHz, 512MB RAM

  • 27" I Mac, constant loud fan noise after replacing hard drive. Help

    Having constant problems with noise since replacing my HD, which failed miserably.  Best Buy installed a 1T Seagate, sounded like airplanes taking off, took it back and they installed a Western Digital Cavair Green 1T.  Noise starts out soft, gets increasingly loud.  Can hear it running in another room.  Hate this- any suggestions.  I've already done the reset thing twice, no help. 

    Is it a late '09? Is the noise the fan? And was your first HD a Seagate as well, with the correct temp sensor cable? Here's an explanation. Surely Best Buy would know that but maybe not. A 1TB Seagate is listed as working in the article, but it has to be a HD with the temp sensor inside, not attached to the outside of the drive.
    http://blog.macsales.com/2751-proprietary-cable-can-put-the-brakes-on-upgrading- late-09-imacs

  • Digital(computer) noise on headphone output jacks

    Hi
    I have a dv9000 which has a problem with  digital(computer) noise on headphone output jacks. I hooked  it up to my car
    stereo axillary input jack and noticed a lot of static noise, even with laptop sound muted. Only time there is no static, or very minimal  is when I put the laptop in hibernation mode. So I'm pretty sure it's a digital form of noise.
    I have a HP DV5T also and it does not have this problem. So is this a common and accepted problem with all older dv9000 series laptops?  Or is there a problem with my dv9000? and if so, what do you think it might be.  I've looked at the dv9000 headphone output on the Oscope and I did indeed see square waveforms mixed in with other random noise.
    FYI---When head phone is used, there seems to no noise or is very faint. Do headphones have inherent ability to filter out the digital form of static?
    Thanks
    Tom

    i just bought a 4520s pro-book and i'm having the same problem but i DO hear the noise with my headphones. when i plug in my headphones i can hear every time the HD spins or a window opens or closes, and the cd drive is unbearable. this is driving me nuts because i bought this notebook for my music production so i sometimes spend hours with headphones in. i have contacted support with no success. anybody have any ideas?

  • Noise cancelling greyed out

    Hi gang,
    Thanks for all the help thus far.  Having finally got my phone back from Sony I'm loving it, it's a delight to use and a powerhouse, just don't get it wet!
    Anyhow I can't figure out the noise cancelling.  The option is permanently greyed out no matter what headphones I use or what options I select.  I'm prob missing something simple, but any ideas?
    Thanks in advance!

    Does anyone know what models of Sony noise cancelling headphones work with the Xperia Z3's noise cancelling function?
    I have a pair of Sony MDR-NC60 noise cancelling headphones but when these are connected to the Z3, the noise cancelling menu is still greyed out.
    Is anyone from Sony Support able to explain how the Z3 detects if the headphones connected to the headhone jack are compatible noise cancelling types?
    Cheers,
    Alan

  • When I play music on iphone5s and charging - I get feedback/buzz from noise cancelling headphones

    This only happens when charging and using noise cancelling headphones (sennheiser PXC350).
    I get a buzz, but if I touch the metal on top or bottom of phone the buzz goes. Electrical interference, if I turn the noise cancelling off, no buzz.
    Other headphones are fine that aren't noise cancelling.
    Any ideas if this is a fault with the phone?

    Likely due to build up (and discharge) of static electricity (referred to as ESD).  Ever scuff your feet on carpet and touch someone else? Similar concept here -- your iPad is getting charged up, probably due to movement against a nice generator like the nylon lining in your purse, and discharging through your headphones into your ears.  This effect is often a bit worse in very dry climates.  Perfectly harmless, but not comfortable.
    To test this theory, walk around holding your iPad rather than putting it in your purse.  Any better?  If so, either carry your iPad or put it in something that is not going to generate static charge like the inside of your purse.  Plastics and nylon are good static generators, so keep it away from those.  Leather, silicone, rubber, etc. are pretty low generators, and pretty insulative to generators outside of them.

  • Nasty rumbling noise from front fan.

    Hi Guys,
    My nice new Mac Pro that was near silent yesterday has now has become very noisy today, sob, sob.
    I have removed the disks and started it up with the cover off and had a listen and have tracked the loud rumbling noise down to the front fan. After turning the machine off I stuck my fingers in and there seems to be some play in the fan blades.
    Has anyone else had this, and if so does it go away or get worse?
    Thanks for any help
    Andy

    Fan bearings wear out and become louder over the years, but it sounds like you got a bad ball or sleeve bearing from the factory, it happens...
    I don't know how easy it is to replace the fan, but to avoid messing up your warranty you should get an apple service center to look at it.
    You could try waiting it out for a week or two though. If you're lucky it'll become less noisy after grinding away on the bearing for a while.

Maybe you are looking for