Calibration Mic Trouble

edited December 1969 in Electroacoustics Toolbox
Hi, I'm trying to calibrate my mic in Electroacoustics Toolbox but without success, probably I wrong to insert the values.

I have a Beyerdynamic MM1 omni microphone its sensitivity @1Khz is -36.9 dB re 1V/Pa, equivalent to 14.3 mV/Pa. When I insert this value in the I/O Device Setup -> Input -> Units = Pa and Sensitivity = 14.3 mV/Pa, the Sound Level Meter  indicates 115 dB, and believe me I'm in a quiet room  :-P, for example my Sound Level Meter on iPhone indicates 40 max 45 dB.

Where I wrong?


  • redbox,

    Have you also calibrated the voltage sensitivity of the audio input device your mic is connected to? If that voltage sensitivity isn't correct, then the acoustical measurement won't be correct, either.

  • I have tried to calibrate my input device but without success. How can I know input and output sensitivity of my device?  :oops:

    The Calibration Channel viewed in the Device IO setup, correspond to the physical loop between the input and output channel with a TRS cable?

    I'm really sorry but I haven't familiarity with this stuff, I really need an explanation for dummies, please help me  :|  :cry::|  :cry:
  • redbox,

    I'm sorry you're having a tough time.

    Have you read the calibration tutorials in the Help files (you can access them from the Help menu in the app)? There are tutorials for input and output voltage calibration, as well as microphone calibration.

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