Analyzing frequency response of audible sounds

Discussion in 'General Electronics Chat' started by TammyG, Oct 29, 2008.

  1. TammyG

    Thread Starter New Member

    Oct 29, 2008
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    Hello,

    I would like to like at the frequency response of audible sounds using an oscilloscope.

    If I go to RadioShack and buy a simple electret microphone, can I simply connect the osciiloscope leads to the output of the microphone and ground?

    A response would be most appreciated.
    Tammy
     
  2. SgtWookie

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    Jul 17, 2007
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  3. bertus

    Administrator

    Apr 5, 2008
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  4. scubasteve_911

    Senior Member

    Dec 27, 2007
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    If you want to know frequency response, an oscilloscope is not what you want to use. You should be using a spectrum analyzer, which gives you the amplitude of discrete frequencies across a spectrum.

    Buy a computer microphone and use that, you can find programs that will give you the FFT of the signal. Matlab can do this.

    Steve
     
    Last edited: Oct 29, 2008
  5. SgtWookie

    Expert

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    If you can record something in a .RAW format, you can use Linear Technology's LTSpice to generate an FFT plot.
     
  6. Dave

    Retired Moderator

    Nov 17, 2003
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    There are also several dedicated numerical computing environments similar to Matlab that could be used that will provide wider import options and finer tuning for the FFT algorithm: http://forum.allaboutcircuits.com/blog.php?b=65

    Octave is particularly good.

    Dave
     
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