Mic Sensitivity

[Chuck Gerlach]

I am having difficulty using my Earthworks mic - it appears to be much more sensitive than my other mics.

My question is: How, exactly, do I format the mic sensitivity in the mic calibration file? Also, if I change mics [and hence calibration files] do I need to restart REW or just delete the old cal file and insert the new one?

I looked in two different mic cal files [a miniDSP mic] and another USB mic and the sensitivity descriptions were different in each. One [the USB mic] read; "+1000Hz -31.4" and the miniDSP mic read: ""Sens Factor =-1.789dB, AGain =18dB"

Thanks in advance for your assistance.

 

[John Mulcahy]

Format is in the Cal files preferences help:

Analog microphone cal files can also include sensitivity information. Add a line at the start of the file of the form:

Sensitivity -12.34 dBFS

where "-12.34" is replaced by the REW dBFS input level when the microphone is driven by 94 dB SPL. When that cal file is used REW will use the sensitivity data to calculate the SPL calibration offset. Note, however, that this calibration will only be valid when using the same mic interface gain and input volume that were used when it was measured.