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Earphone's volume level question

Discussion in 'Electronic Basics' started by kimiraikkonen, Nov 1, 2007.

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  1. Hi experts,
    At first, i though it may be a earphone / device failure, but after
    i
    experience that issue with several devices, i decided to ask:

    Here it is: With some Stereo (natively stereo anyway) mp3 players,
    although the earhphones (headphone) are totally stereo, the "left"
    earphone gives noticeably higher sound / volume level than the right
    earphone when compared. However, against the fault probablity of my
    ears, i put left earphone to my right ear, the result is ; again the
    left earphone (on my right ear) gives higher / volume.


    Lately, i heard something like "channel separation" has some value
    e.g. : channel separation: 35db , SNR : 85db
    on my mp3 player. Is it related to this?


    Why does left earphone usually gives betther / higher volume than
    right earphone? Is it normal or what's the technical explanation?


    Note: It's not song-specific. I tried a lot of songs with more than
    one device / earphones...


    Thanks...
     
  2. -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA1
    No - channel separation is the maximum separation between the two
    channels in terms of volume. 35db is pretty darn poor! If I were you, I'd
    be worrying about getting a new player than your earphones.
    I would put my money on broken earphones. If they're cheap it's probably
    worth your while getting a new pair.

    Otherwise, look around the PCB for damaged or corroded connections,
    especially near the headphone jack.

    - --
    Brendan Gillatt
    brendan {at} brendangillatt {dot} co {dot} uk
    http://www.brendangillatt.co.uk
    PGP Key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBACD7433
    -----BEGIN PGP SIGNATURE-----
    Version: GnuPG v1.4.3 (MingW32)

    iD8DBQFHKim/kA9dCbrNdDMRAtq4AJ9Ka0y6uFyaI4sje1eKiOytqtG+vgCeKVtu
    S1XoelTNRVzkGZG5jWZU/t8=
    =OGYP
    -----END PGP SIGNATURE-----
     
  3. So, is it a hardware fault or is it a device deficiency? I mean, is
    all the same models of my mp3 players have the same problem or it
    special for mine?

    Finally, to understand better, isn't that)low right earphone sound)
    related to channel seperation? Because player is brand-new.

    Thanks.
     
  4. Bob Masta

    Bob Masta Guest

    Not sure what you mean by this last: Different *players* as well as
    different *phones*? If the problem is only on one player then
    it is a stereo balance problem. If it is only on one pair of phones
    then it's a problem with one of the drivers. And some songs may
    naturally have more output in one channel, though not common.
    But if you notice this with all players and all phones and all songs,
    then it's a clear sign of really strange musical preferences! <g>

    Best regards,


    Bob Masta

    DAQARTA v3.50
    Data AcQuisition And Real-Time Analysis
    www.daqarta.com
    Scope, Spectrum, Spectrogram, FREE Signal Generator
    Science with your sound card!
     
  5. Tried with another earphones on same player with same strongs, almost
    same experience. Some songs have more loud on left channel emphasised.
    I don't record them they're mp3s.
     
  6. Bob Masta

    Bob Masta Guest

    Sounds like the channel balance on the player needs adjustment.
    Isn't there a control for this? On some devices there may not be a
    "balance" control, but instead individual left and right volume
    controls that normally turn as one knob with a concentric
    surround. The surround is deliberately hard to turn separately,
    so that when you just turn the apparently-single knob you are
    turning both controls together.

    Best regards,


    Bob Masta

    DAQARTA v3.50
    Data AcQuisition And Real-Time Analysis
    www.daqarta.com
    Scope, Spectrum, Spectrogram, FREE Signal Generator
    Science with your sound card!
     
  7. redbelly

    redbelly Guest

    I have a dumb question: are you absolutely sure you're pushing the
    jack in all the way?

    Mark
     
  8. What do you mean, my hands are free during listening. However, i'm
    about to conclude most of the songs or at least my songs are recorded
    in left stereo channel priority / balanced.
     
  9. redbelly

    redbelly Guest

    I mean, when you connect the earphones to your player, do you press
    firmly on the connector to make sure the plug is completely inserted
    into the jack?

    What you do with your hands while listening is irrelevant.

    Mark
     
  10. Yes they completely seated.
     
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