Audio Output Analysis for the iPhone 4

Discussion in 'iPhone' started by DRRty, Dec 14, 2010.

  1. DRRty macrumors newbie

    Dec 14, 2010

    I am trying to figure out the frequency range of the iPhone 4 internal speakers. Also, I am wondering if the iPhone 4 boosts and/or attenuates any frequencies of the audio that is outputted. Basically, I am trying to design something that will take my music and emulate how it will sound on iPhone speakers (without actually playing it out of the iPhone and by using EQing and Filtering to emulate the sound). Any information/assistance is greatly appreciated, thank you in advance.

  2. TruckdriverSean, Dec 14, 2010
    Last edited: Dec 14, 2010

    TruckdriverSean macrumors 6502a

    Feb 28, 2009
    Texas, US
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 Safari/6531.22.7)

    There are some videos on YouTube that play tones (mostly focused on bass tones) at set frequencies, with the frequency displayed on the screen.

    While not exactly scientific, it could give you a quick and dirty answer. I used them to test out the factory sub/amp in my wife's vehicle.

    Edit to Add: Unless you're including the earpiece at the top, the iPhone only has one speaker.
  3. ItsJustafnPhone macrumors 6502a

    Jul 26, 2010
    a) what is the point of this

    b) why not just play it over the iphone and see for yourself

    c) if you do not have one, then go online and purchase the iphone 4 speaker by itself and connect it to an audio output

    we dont' work for apple = we have no idea what kind of audio algorithm if any they use when the sound is outputted to the speaker

    my guess = none

    the link provided above you is as good as its going to get
  4. VulchR, Dec 15, 2010
    Last edited: Dec 15, 2010

    VulchR macrumors 68020


    Jun 8, 2009
    If you need more information than the GMS Arena review, you might want check out This developer offers an app (Audiotools) that is meant to analyse the characteristics of sound with a matching calibrated microphone (Audiointerface). The app/microphone combination offers capabilities for characterizing sounds that would cost much more if you used dedicated sound analysis hardware. If you are developing an application that mimics the sound capabilities of the iPhone4 (great idea by the way since using the EQ on the iPhone/iPod chews up so much battery power), you might want to invest in the system since you'll have to adapt it for each new model of iPhone.

    I am not affiliated with the company, but I do use the app & microphone in my psychological laboratory to make quantitative measurements of sound frequency and intensity and I am very impressed with it. I use the system with the cheapest iPod Touch and the combined cost the app, microphone and iPod is about 10 times less that a dedicated sound meter with similar capabilities. There are even add-in modules for the app that would do precisely what you want. I'd take the measurements for you and post them here, but alas I am a poorly paid UK scientist and can only afford a 3GS. :(
  5. JaSuS macrumors regular


    Jul 22, 2010
    My AntennaGate theory: The iPhone-4 was originally supposed to use Bumpers. Someone showed the phone to Steve "naked", and the rest is history...

    LOL:D I like this...

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