NOTE: This is a "Community" forum. Please be mindful that community members are here to help as part of a community effort. We therefore appreciate your effort in keeping this forum a happy place!

If you have a specific issue (e.g. hardware, failure) and want help from our support team, please use our tech support portal (Support menu - > Contact Us).
Thanks a lot of your help in making a better community.
 Page:1

# TOPIC:

## UMIK-1 calibration meaning? 1 year 3 months ago #54067

 jffbaker Topic Author Offline New Member Posts: 1 Thank you received: 0 Despite searching these forums, I don't see a straight and usable answer for the simple question "how do I use the Umik-1 Calibration" outside of canned software? I'm measuring with Matlab and Audacity, and need to know the dBFS output of the mic for a given dBSPL. For example: The mic gives xxx dBFS for 94dBSPL sine wave stimulus at 1kHz. What is xxx? How exactly is it related to the 'Sens Factor' in the calibration file? And what is the relationship between Sens Factor and analog gain? With a 1kHz 94dB stimulus, I measure about -22dBFS from the mic. That's with 18dB analog gain. With no gain that would have been -40dBFS, and with 36dB gain it would have been -4dBFs. With my Sens Factor of almost exactly +4dB, I think I can concluded the following: The mic gives -36dBFS for 94dBSPL at gain = 0dB after adding the Sens Factor to the measurement The mic gives -18dBFS for 94dBSPL at gain = 18dB after adding the Sens Factor to the measurement The mic gives 0dBFS for 94dBSPL at gain = 36dB after adding the Sens Factor to the measurement Is that all correct? Thanks, Jeff Please Log in or Create an account to join the conversation.