Midwest Audio Fest

It’s that time audio enthusiasts! Registration for the 2019 Speaker Design Competition is now open! Visit for details and to list your speaker project. We are excited to see all returning participants, and look forward to meeting some new designers this year, as well! Be sure your plans include a visit to the Parts Express Tent Sale for the lowest prices of the year, and the Audio Swap Meet where you can buy and trade with other audio fans. We hope to see you this summer! Vivian and Jill
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Natural sources of Pink Noise for Microphone Calibration

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  • Natural sources of Pink Noise for Microphone Calibration

    I wanted to check the frequency response of a microphone and cannot of course use a speaker as they are an unknown value.

    I have heard that an air compressor can be used to generate full spectrum pink noise. Any credence to this? How about other good sources for pink noise?

    Or is there a better DIY way to check how flat a mic is?

  • #2
    You really cannot "calibrate" a microphone in this manner. Even if you had a perfect pink noise source, as soon as you put it into an environment that is non-anechoic, you will have altered the response with reflections that will cause it to no longer be a flat source. Calibrating a microphone requires a very controlled environment.