Three Microphones on iPhone ???

Discussion in 'iPhone' started by pleasehelpjrc, Nov 20, 2014.

  1. pleasehelpjrc macrumors newbie

    Joined:
    Aug 28, 2014
    #1
    The 6 plus has 3 microphones just like the 5 and 4.

    :confused:I would like to know which microphone is active with which app?:confused:

    Some cases seem to cover a microphone.
     
  2. cmichaelb macrumors 68020

    cmichaelb

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    Kansas
    #2

    3? There's one the bottom and the one next to the camera. Where's the third?
     
  3. Gav2k macrumors G3

    Gav2k

    Joined:
    Jul 24, 2009
    #3
    As above there is 2

    iPhone 4/4s was on top next to headphone jack and at the bottom.

    5/5s was between camera/flash and bottom

    6/6+ same as 5/5s
     
  4. ABC5S Suspended

    ABC5S

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  5. cmichaelb, Nov 20, 2014
    Last edited: Nov 20, 2014

    cmichaelb macrumors 68020

    cmichaelb

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    #6
  6. scaredpoet macrumors 604

    scaredpoet

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    Apr 6, 2007
    #7
    All three, all the time a mic is needed. One becomes the primary mic, and the other two are used for noise cancellation.

    As for which mic becomes the primary, it's not app-dependent, but rather use-case dependent.

    In regular phone mode, obviously the bottom mic is the primary, with the rear mic used for noise cancellation. But when you switch to speakerphone mode, the phone switches between the three mics depending on where a clear, loud human voice is speaking relative to the phone, and how the phone is oriented.
    Same is true for when audio recording apps are being used.

    For video recording, and FaceTime: Primary mic depends on which camera is being used. Turning on the front-facing camera makes the front-facing mic the primary. Using the rear camera switches it to the rear mic.
     
  7. ABC5S Suspended

    ABC5S

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  8. willmtaylor macrumors G3

    willmtaylor

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    #9
    If you don't mind me asking, how in the world do you know this? (And it's not that I doubt that you know; I just want to know how you know).
     
  9. hamiltonDSi macrumors 68000

    hamiltonDSi

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    #10
    I think it kinda makes sense. I have no clue how the mics work but I agree with that post.
     
  10. scaredpoet macrumors 604

    scaredpoet

    Joined:
    Apr 6, 2007
    #11
    I pay attention to the Apple Keynotes. :) The process was described when they explained the 3 mics.

    Also, there is a tidbit of info on how it works here:

    http://www.cultofmac.com/275481/disable-phone-noise-cancelation-iphone-ios-tips/

    Incidentally, this process of noise stream counteraction (which is really what's happening) can actually cause some uncomfortable sensations for some, which is why it can be turned off in settings.
     
  11. pleasehelpjrc thread starter macrumors newbie

    Joined:
    Aug 28, 2014
    #12
    The user manual lists them as front, bottom and rear.

    See attachment. However, the manual does not tell which works when?
     

    Attached Files:

  12. AutoUnion39 macrumors 601

    AutoUnion39

    Joined:
    Jun 21, 2010
    #13
    I'm not sure where the mics are on the 6+, but the noise canceling is fantastic. I was talking on the phone when it was crazy windy last week and the person on the other end could not hear it as all.
     
  13. cmichaelb macrumors 68020

    cmichaelb

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    #14
    The bottom one mostly for your voice. The other two are for noise cancelling.
     
  14. that be me macrumors 6502

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    Sep 12, 2013
    #15
    All these microphones and yet the iPhone still can't record video with stereo sound. Seriously apple, fix this. It's been long enough.
     
  15. teknikal90 macrumors 68030

    teknikal90

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    Vancouver, BC
    #16
    I'm a recording engineer and I doubt you'd be able to tell a difference between a stereo micd phone and a mono phone, when the mics are placed 15cm apart (chances are, the left Mic on those 'stereo phones' will pic up almost exactly what the Right mic is picking up. Thereby, no stereo).

    I recorded a concert the other night on the iPhone and the sound was unbelievable.
     
  16. 11bE5 macrumors 6502

    11bE5

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    Sep 23, 2012
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    Spokane Wa
    #17
    The third one is inside the phone behind the FFC and earpiece
     
  17. lucansmiles macrumors member

    lucansmiles

    Joined:
    Jun 3, 2014
    #18
    I'm a recording engineer myself and I agree 100%.

    It doesn't make any sense to include a stereo mic in a 15.8cm phone since for an AB-stereophony at least 20cm of space between the mics would be required, depending on the sound source to be recorded. Everything smaller than that will pretty much result in a mono recording.

    This problem could be solved by using cardioid microphones creating a XY-stereophony which don't require any space between them whatsoever, however, a cardioid pattern would need to be created acoustically, which takes up a lot of space, so this is no possibility either in a phone that small.

    However, on an iPad which is almost 25cm long in landscape, a stereo recording would somewhat work, again, depending on the sound source to be recorded. Normally, you would record sound sources further away than a few inches which requires much more space (up to 2m) to create a stereo recording.

    Sorry to burst your bubble here but you guys will be stuck with mono.
     
  18. coolbreeze macrumors 68000

    coolbreeze

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    Jan 20, 2003
    Location:
    UT
    #19
    All you "audio engineers" are so incorrect.

    Audio on my Lumia 1020 and HTC M7 is ridiculously awesome. Clear separation, clear sound. It's amazing.
     

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