Question about Bose QuietComfort 2 Consumer Headphones

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Feedback in qc-2 headphones

It used to be that when you pushed on the earpiece of the qc-2's, they got a whistlimg sound like mic feedback. Now they are doing it almost constant. Otherwise the headphones are great.

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  • dustybootstr Feb 07, 2009

    I get a sound like mic. feedback on Bose QC-3 headphones. I get the feedback sound on all sources..It is mainly on one ear, but has gotten progressively worse..

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I think its a loose connection inside the headphones ear piece which is causing some kind of short and causing this feed back kind of sound. Give a call to bose if its still in warranty, else you got to live with it.

Thanks for using Fixya

Posted on Feb 07, 2009

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You have a loose connection or soldier joint on the Acoustic Noise Cancelling board on the side that is giving the feedback.

Posted on Feb 07, 2009

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Check the headphones on different units - not the same unit - different source altogether.
sounds as if the headphone jack has become damaged and needs to be replaced.

Posted on Feb 07, 2009

  • blueextc3221
    blueextc3221 Feb 07, 2009

    most likely the one on the earpiece itself. not on the source unit.

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Ensure the ports are clear and headphones are adjusted for a proper fit.

This -->link<-- is the owners manual for your unit

Thanks for using Fix Ya.

clarkco

Posted on Feb 07, 2009

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Hi and welcome to FixYa,

Initially, it would have to be determined if indeed the Bose QuietComfort 2 headphones is the one faulty or the device to where it is plugged into. Steps to do this would be:

  • try the QC-2 to several devices, MP3s, cellphones, laptop;
  • if whistling is consistent, then the QC-2 has been verified to be faulty;
  • if not the issue is with the signal source.
If the QuietComfort 2 headphones are determined faulty, checks could be done by using a DVM/VOM as continuity tester:
  • check the resistance of the left & right headphones/mini speaker by removing the padding, cover and exposing the connection behind;
  • check the continuity of the wires/cables from the 2.5mm stereo phone connector to the soldered joints at the back of the headphones/mini speaker;
  • the readings of the headphones/mini speaker must be identical on left & right;
  • the wires must read 0 ohms or nearly 0 ohms;
  • the resistance reading on the 2.5mm stereo baby phone plug must be identical; i.e. rear to tip is equal to rear to middle.
In some remote instances, it could be the headphones/mini speaker themselves that are at fault.

Good luck and thank you for using FixYA.

Posted on Feb 07, 2009

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Need to check the sire.

Also, does it make the sounf when you connect to all devices. If it happens only when you connect to Laptop, you need to get the sound card checked.

Thanks

Posted on Feb 07, 2009

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Posted on Jan 02, 2017

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There is a horrible echo whenever i try to record and then there's a loud noice that sounds like a very high-pitched whistle and i don't know what to do.


This type of audio feedback loop can happen on any mic if you are playing back audio at a loud volume on speakers that are close to the mic while the mic is on - which tends to happen on Skype calls. Try lowering your speaker volume or using headphones to hear the audio, then speak into mic, and the feedback should be reduced.

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I want to use this for skype on my computer and it wont pick up the mic


Hi hilldest,

These headphones cannot be used for your computer ,because you computer requires seperate input for mic, unlike the mobile phone where you have only one pin and then it includes the mic function with it.

So if you want to use the mic you can use it by connecting a seperate mic in the pink slot of your computer and you can still use these headphone to listen to the incoming voice by pluggin it in the green slot of audio output.

Hope this helps ..:) Your feedback would be appreciated.

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There is a screeching sound coming from acer aspire 4738Z we can hear our own voice when the headphones are put on and when we take the headphones off the sound starts coming again sometimes it stops on...


LOL you hear feedback noise, it's feedback! Go into the sound settings and in the mixer for audio output, mute MIC. (the built-in microphone for webcam conferencing, evidently.) Don't worry that it will keep you from using the mic (pron. 'mike') in the input mixer, because that's a whole other section of the 'board'.

It could of course also be some other app doing the ill-filtered mixing, but see the mixer settings first.

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This camera is without a microphone or I don't


If you have a laptop you can use the built-in mic and speakers
If its a desk top you will have to buy speakers and a mic.
Maybe better to have a headset ( headphones and mic ) to prevent 'feedback' / echo and some privacy

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My microphone will not work, and my computer won't recognize!


Common problem with this headset.

In short, the wiring for the mic in the left earpiece is quite shoddy, and over time will be worn away by changing the mic position or come loose with minimal effort.

Have had a over a dozen of these fail in our internet cafe due to this issue after a couple of months use.

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Line in / Mic jack help


So we're talking PC here, right?

I don't understand what you want to record. Going from the PC Headphone jack to the PC Line IN might be unwise in order to prevent a feedback loop. External (non-PC) source and PC MIC might work but you would probably want to monitor it on headphones again because of possibe feedback.

Does your MIC work?

Right click the speaker icon again and select Adjust Audio Properties or open Control Panel and select Sounds & Audio Devices. Select the box to place the icon on the Taskbar for future use.


Right click on the little speaker icon in your Taskbar and select Open Volume Control, if it's there. From there you're on your own. I have a sound card so I don't know what you will see. Look around, there may be a bunch of audio outputs and inputs with Master and individual volume & balance controls plus one for your Mic. Make sure it's not muted.


Apr 21, 2009 | Audio Players & Recorders

3 Answers

Speakers work fine. But left earpiece has low vibration.


I had exactly the same problem. They will give you a new pair for $100, even if it has been longer than a year... Here is a link to my blog post...

http://riajournal.com/ria/index.php/2009/04/25/bose-gets-5-stars-in-my-book-for-their-qc3-headphones/

Mar 29, 2009 | Bose QuietComfort 3 Acoustic Noise...

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Sometimes my corded phone screeches when I am using it. It happens if I move my hand over it and will quit when i move my hand from it.


What you hear is called acoustic feedback, the same thing when you get close to loudspeaker with mic. It is normal. The sound from headphone bounces of you hand where is picked up by mic, amplified and emitted back by headphone. A pitch would depend on how far is your hand from the receiver.

Feb 27, 2009 | Lands Phones

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My headphones are feedbacking all of a sudden


The design of these headphones includes a microphone on the outside and on the inside of each earcup. The outside microphone detects outside noise. The inside microphone monitors what you are hearing and when it detects that the outside noise is present inside, the active noise-canceling circuits remove that noise. This happens fast enough that you perceive a siginficant reduction in the outside noise getting to your ears.

The airspace inside the earcup is a tuned chamber defined by the foam in the ear cushion. This is important because with the inside microphone in close proximity, but at a 90-degree angle to the speaker, the circuit must be designed to eliminate the normal feedback that occurs.

If the foam in the ear cushion has weakened/deteriorated to the point that it no longer has it's original shape, (in particular the lower half of the ear cushion), the size and shape of the air chamber inside of the earcup is directing more of the speaker sound toward the microphone than the design can compensate for causing audio feedback to occur. You are hearing that feedback.

On my QC-3 headphones, I can cause the feedback squeal in both earcups, with the left earcup being more sensitive to the shape change than the right.

It may be time to replace the ear cushions. If so, they are available from Bose for around $35/pair.

http://www.bose.com/controller?url=/shop_online/headphones/noise_cancelling_headphones/accessories/qc3_earcushionkit_acc.jsp

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