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Phone noise in noise canceling headphone

Discussion in 'Electronic Repair' started by Leif Neland, Oct 19, 2013.

  1. Leif Neland

    Leif Neland Guest

    I get the classic "woodpecker" sound when I connect my noise-cancelling
    headset to my phone.

    What can I do to kill that noise?

    Ferrite beads or rings?

    Tinfoil around the electronics blob on the cable?
     
  2. Guest

    How do you connect the headphones to your telephone? Are the impedances reasonably matched? Is thre any acoustic feedback from the headphones into the microphone of the telephone?
     
  3. gregz

    gregz Guest


    Switch to Verizon ?

    Greg
     
  4. Leif Neland

    Leif Neland Guest

    kom med denne ide:
    I assume a mini-headphone jack plugged into the headphone outlet on the
    phone is the right way to do it, and the impedance is probably
    reasonably too. :)

    I am not talking about using the headset for "phoning", only for
    listening to podcast/music while commuting publicly, so the microphone
    on the telephone are not in business.

    Leif
     
  5. Leif Neland

    Leif Neland Guest

    Den 20/10/2013, skrev gregz:
    If I do, will the phone still make the noise when trying to connect to
    a carrier on another continent? I'm in Denmark. Europe, you know :)

    Leif
     
  6. Guest

    I am not familiar with the "classic woodpecker" sound, can you please describe it?
    I am assuming that if you just listen to the music on the telephone instrument you do not get any noise?? When you are listening just on the telephone, is it live - being downloaded as you listen, or is it music that you have previously downloaded to the telephone?
     
  7. Sounds like a cell phone, and you're posting from a .dk domain

    The problem is probably the rediculous pulses GSM phones send out.

    This not a problem with the properly designed CDMA system.

    Is this the sound you're hearing?

     
  8. Leif Neland

    Leif Neland Guest

    Cydrome Leader sendte dette med sin computer:
    You are right. I can on my phone select
    * GSM/WCDMA (automatically)
    * GSM only
    * WCDMA only

    I'll try WCDMA only next time.

    Leif
     
  9. Leif Neland

    Leif Neland Guest

    har bragt dette til os:
    It is the GSM noise cydrome references:


    I do not get the noise when listening on the cellphobes speakers (But
    my fellow commuters would probably complain).

    I only gets the noise on the headphones when the active noise-canceling
    electronics is turned on, not when it is turned off and it is working
    like a regular headset.

    Leif
     
  10. I get that noise over CDs I rip onto iTunes on my MacBook Pro. It comes andgoes as the recording is progressing. It is incredibly annoying when you record 20-30 CDs and then have to listen IN REAL TIME to all of them to see which are affected to re-record them and hope the clicking doesn't recur!

    It should be possible to design a noise detection system similar to the SAEimpulse noise reduction system which recognises scratches on LPs but a better way should be to figure out which bit of the computer needs better shielding. I don't get the noise when I record the CD with the phone AWAY fromthe computer, eg charging in another room.

    (sorry if this is a bit OT: I have a half dozen pairs of noise reduction cans and have never had this problem with any of them)
     
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