UMIK-1 SPL Reading at 90db in 'Slient" Room

kmartinka

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Hello,

I am new to the forum and I am trying to get my new UMIK-1 to work properly. I am having a problem with the SPL meter function reading ~90db in a silent room. See attached picture.
38590


I am using REW V.5.19 and I have entered my cal file from miniDSP. Please see attached cal file.

38592


Is my mic defective or did I do something wrong.
 

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  • 7080209_90deg.txt
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goginux

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try calibration file,
Unique Calibration File Download

All UMIK-1 are calibrated with a unique calibration file. In addition, a unique auto-generated 90-degree calibration file for use with surround system applications. To download the calibration files, look for the 7 digit Serial Number found on the body of the microphone.

  1. Enter the serial number in the form below (three digits then four digits e.g. 700-XXXX).
  2. Your calibration files will automatically download in most browsers. If not, click on the links provided to manually download
minidsp page
 

kmartinka

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EVGA NU Audio PRO 7.1
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Martin Logan ESL
Center Channel Speaker
Martin Logan EM C2
Surround Speakers
Martin Logan FX2
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P85QX-H1
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Logitech One
Thanks for the reply. I have the calibration files from miniDSP and one is loaded in REW. I posted the calibration file in my first entry.

So I am not sure why the microphone reports ~90db in a slient room with REW.
 

DanDan

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Faulty Mic perhaps. Can you run REW with another mic, even an onboard laptop or anything.
 

jtalden

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Try removing the quotes on the sensitivity entry in the cal file.
 

tobiasga

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I am having the exact same problem.. tried removing the quotes around the line with sensitivity.. didn't help in my case.
 

kmartinka

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Martin Logan ESL
Center Channel Speaker
Martin Logan EM C2
Surround Speakers
Martin Logan FX2
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Logitech One
I do not have another mic to test with on this PC but I do have another laptop I can try in a bit.

Removing the quotes in the cal file did not work as well.

I have tried both 32 and 64 bit flavors of REW 5.19 and had the same results. I also tried REW 5.20 RC5 with same result.

I have made a support ticket with miniDSP and waiting to see what they have to say.

I am thinking of trying a UMIK-2(if I can get it) and see if it does the same result.
 

tobiasga

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It seems like your sensitivity factor (-40.06dB) is also very low like mine (-39.88dB). I have made a support ticket at miniDSP too - let's share any replies we get here? :)
 

tobiasga

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They replied back to me and the calibration file was wrong. They made a new one with a fixed sensitivity factor. Probably the same happened with yours.
 

kmartinka

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PC BD PLayer
Front Speakers
Martin Logan ESL
Center Channel Speaker
Martin Logan EM C2
Surround Speakers
Martin Logan FX2
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P85QX-H1
Remote Control
Logitech One
I also received an email from miniDSP indicating the calibration file has been fixed. This resolved my issue.

Thanks to all who tried to help.
 

astolfo

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Can you post what they changed? before/after?
thank you
Astolfo
 

goginux

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dynaudio
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dali
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dynaudio back
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philips
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dali
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dali bose
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lg
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one for all
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pioneer sacd
I have 4 microphones, umik-1 is calibrated by cross spectrum labs, dayton audio factory, sonarworks also factory, audysey is calibrated by me. at umik-1 i have never used factory calibration. here example with measurements from different microphones.
mic diferent.png
 
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