Welcome, Guest
Username: Password: Remember me
Here is the place to share your questions/comments about your setup of the UMIK-1 USB measurement microphone


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.

TOPIC: LAeq REW/UMIK vs Cls 1 - calibration THAT WRONG?

LAeq REW/UMIK vs Cls 1 - calibration THAT WRONG? 2 months 1 week ago #47951

- connected a new UMIK-1 with REW on Linux with correct calibration file (705-6904)
- comparing the LAeq AF with a calibrated Class 1 (Cirrus Research CR 171)
- the difference is always more than 5 dB, sometimes 20 dB


- what's wrong?
- are my expectations too high?
- how can I re-calibrate? I have an 94 dB calibrator
The administrator has disabled public write access.

LAeq REW/UMIK vs Cls 1 - calibration THAT WRONG? 2 months 1 week ago #48012

  • john.reekie
  • john.reekie's Avatar
  • Offline
  • Platinum Boarder
  • Posts: 3731
  • Thank you received: 1578
  • Karma: 140
You could use the calibration function in REW, click on the SPL Meter button.
I'm wondering though whether you got the dialog popup in REW asking whether to use the UMIK-1 calibration. That's necessary for the SPL adjustment to work.
I am not miniDSP support.

"You must ask the right questions." - Dr. Alfred Lanning's hologram.
-> Have you read the User Manual??
-> Have you drawn and posted a diagram?
-> Have you posted a screenshot?
-> Have you posted your config file?
The administrator has disabled public write access.

LAeq REW/UMIK vs Cls 1 - calibration THAT WRONG? 2 months 1 week ago #48016

  • Ultrasonic
  • Ultrasonic's Avatar
  • Online
  • Platinum Boarder
  • Posts: 706
  • Thank you received: 130
  • Karma: 14
Are you measuring at exactly the same position and using the same weighting?
The administrator has disabled public write access.

LAeq REW/UMIK vs Cls 1 - calibration THAT WRONG? 2 months 1 week ago #48033

Yes, I'm using the downloaded calibration file.

Meanwhile I adjudsted the "Sens Factor" in the file and getting close enough.
The administrator has disabled public write access.

LAeq REW/UMIK vs Cls 1 - calibration THAT WRONG? 2 months 1 week ago #48034

Maybe the position was not near enough. The weighting was the same.
The administrator has disabled public write access.
Moderators: devteam