second step, the measuring chains that embed the MEMS accelerometer and the ECM are calibrated against the microphone ECM8000. The derived ECM8000 calibration SPL measurement(BLUE) tracks pretty close to the GREEN baseline, but the phase is a bit off at the ends.Calibration function estimated for the microphone Behringer ECM8000. I just tried it using a Cross Spectrum Labs calibrated UMIK-1's measurement (GREEN) as the baseline and an un-calibrated ECM8000 measurement(RED). Hope this helps and if anyone has a better way to do it, or corrections, please advise. I added an extra 0 to the last 2 lines (3rd column) as what is in the CS calibration files.I then output 2 columns as a text file (65508 lines), first column being the frequency and the second column being the SPL delta from the 3rd worksheet.I then loaded both files into a spreadsheet in different worksheets and subtracted the calibrated SPL column from the un-calibrated SPL calibrated column creating a new delta column in a 3rd worksheet.I edited the text files to remove the file and column header information leaving only the 3 measurement numeric columns (frequency, SPL and phase).

I used the 'File/Export Measurement as Text' option to do a text dump of the calibrated and un-calibrated files.The derived ECM8000 calibration SPL measurement(BLUE) tracks pretty close to the GREEN baseline, but the phase is a bit off at the ends. Click to expand.I just tried it using a Cross Spectrum Labs calibrated UMIK-1's measurement (GREEN) as the baseline and an un-calibrated ECM8000 measurement(RED).

Behringer ecm8000 calibration file