Dictation shuts up cooling fans!

Discussion in 'OS X Mountain Lion (10.8)' started by MarcBook, Jul 25, 2012.

  1. MarcBook macrumors 6502a

    MarcBook

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    Jul 13, 2008
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    Jersey, Channel Islands
    #1
    I'm not sure if anyone else has noticed this, but I've just discovered that activating Dictation while my MacBook Pro's fans are running at high speed causes them to suddenly go quiet, then speed up again once deactivated.

    If you've got iStat Menus or another app that control the fan speed, you can test it out.

    I thought that was pretty cool and wanted to share. :)
     
  2. saxon48 macrumors 6502a

    saxon48

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  3. Pompiliu macrumors 6502a

    Pompiliu

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    Apr 22, 2012
    #5
    Bad idea. The fans run high for a reason. I don't want my components to stay hot!

    Bad idea, Apple!:mad:
     
  4. 3bs macrumors 603

    3bs

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    Dublin, Ireland
    #6
    You are right but they slow down for a reason, so it can listen to what you say without the loud fans interfering.
     
  5. CyBeRino macrumors 6502a

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    Jun 18, 2011
    #7
    Nice touch.

    I wonder if it'll give up once a certain threshold of heat (or time) is reached.
     
  6. Nicklaus macrumors 6502

    Nicklaus

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    #8
    That is cool. I have a Mercedes that does the same thing when the A/C is on Max and you start voice recognition.
     
  7. eagandale4114 macrumors 65816

    eagandale4114

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    May 20, 2011
    #9
    I was testing dictation out while I reinstalled iLife from a disk and it will also spin down the disk drive then start to listen for commands.
     
  8. mentaluproar macrumors 68000

    mentaluproar

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    Location:
    Ohio, USA
    #10
    A CPU can just lower its clock frequency temporarily to compensate for the slower fan speed. When you are dictating, you don't need that extra power anyway.

    This is a very apple idea. Does this happen on the minis as well?
     
  9. rpungello macrumors member

    Joined:
    Oct 4, 2011
    #11
    Unless I'm missing something, this doesn't work for me.
    Fans are currently at 6,000rpm and bringing up dictation doesn't cause them to drop at all.
     
  10. eagandale4114 macrumors 65816

    eagandale4114

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    May 20, 2011
    #12
    At that speed it would probably assume that the system needs the cooling more than the noise cancelation.
     
  11. MarcBook thread starter macrumors 6502a

    MarcBook

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    Location:
    Jersey, Channel Islands
    #13
    What model Mac do you have? It may be that this little feature is only supported on certain Macs; I'm guessing those that have an ability to temporarily clock down the CPU, as mentaluproar suggested.
     

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