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Hi All,
I'm a new REW user so this may be a basic question!

I have a calibrated Dayton EMM6 mic with a datasheet from Cross Spectrum labs. I have used the FRD file that they supplied to give REW a relative response of the mic.

I was wondering if the supplied data for my mic is sufficient to calibrate the absolute SPL readings in REW?

The datasheet says that the response reference is -32dB re 1mV/Pa. REW is asking for a C-Weighted db SPL figure read from a meter.

Is there any way that information can be used or do I need to use/buy an external SPL meter as well as the calibrated mic?

Many thanks, Jim
 

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To my knowledge, there is not a way to enter that sensitivity value manually. You can still use REW without performing the SPL calibration. Frequency response measurements will be accurate, using your frequency response calibration file for the microphone. Absolute SPL value will be off, but there is little need for highly accurate SPL readings anyway. You can even balance speaker levels accurately using relative SPL readings.
 
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