EDIT: Made a new thread looking for the EMM-6 instead. Can't change this title.
Checking to see if anyone has a calibrated electret measurement mic they don't need. I was going to get the EMM-6 since I have phantom power, but it doesn't have accurate SPL measurement and I don't have an SPL meter.
Dayton EMM-6 are serialized and calibration files are available. You look up the
calibration file for a specific serial number here: http://www.daytonaudio.com/index.php/emm-6-electret-measurement-microphone.html
Luckbad Traded in a unicorn for a Corolla
Friend
I will never know the actual SPL I'm measuring at without a separate SPL meter, though. Is that okay?
Of course it is important to compensate the non linearity of te micc (SPL differences versus frequency). Depending what purpose you use the mic for
it might not be neccessary to make sure that you measure 85 dB as 85 dB. For instance if you are interested in measuring the frequnency response of your speakers in your room, it is important to make sure that you compensate the non linearity of the mic but you are more interested in the difference in SPL depending on frequency than the absolute value of the SPL. If you want to create filters based on measurements to do DRC, the former is essential (and atomicbob pointed out that the data is
available) the latter is just nice to have (but the mic will be more expensive).
Oh, you want a level calibration. Best way is to acquire a mic calibrator to use with the mic:
https://www.amazon.com/Decibel-Calibrator-Calibration-Measurement-Microphones/dp/B0786YDF62/
Or get the UMIK-1, though it also benefits from a mic calibrator for fine adjustment.
@atomicbob This is great news. If I wasn’t living on the other side of the pond I might have asked to get that loaner. One question regarding mic calibration. I use REW for my measurements, computer to a Steinberg UR 22. I have to set input and output level on the Steinberg
as well as the volume on my preamp. I do not think I often use the exact same setting. How useful is a one time mic calibration in that case? Wouldn’t I have to calibrate the mic every time I change the settings of in- and output level of the Steinberg and/or the volume on my preamp?
Edit: I use a Behringer ECM8000 for my measurements (with compensation for its non linear FR) with satisfactory results. If you do DRC you should not correct too much in the treble region anyway (where the non
linearity becomes significant).
