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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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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My AV System  
Preamp, Processor or Receiver
EVGA NU Audio PRO 7.1
Main Amp
Emotiva XPA5 GEN2
Computer Audio
EVGA NU Audio PRO 7.1
Universal / Blu-ray / CD Player
PC BD PLayer
Front Speakers
Martin Logan ESL
Center Channel Speaker
Martin Logan EM C2
Surround Speakers
Martin Logan FX2
Screen
P85QX-H1
Remote Control
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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My AV System  
Preamp, Processor or Receiver
EVGA NU Audio PRO 7.1
Main Amp
Emotiva XPA5 GEN2
Computer Audio
EVGA NU Audio PRO 7.1
Universal / Blu-ray / CD Player
PC BD PLayer
Front Speakers
Martin Logan ESL
Center Channel Speaker
Martin Logan EM C2
Surround Speakers
Martin Logan FX2
Screen
P85QX-H1
Remote Control
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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My AV System  
Preamp, Processor or Receiver
EVGA NU Audio PRO 7.1
Main Amp
Emotiva XPA5 GEN2
Computer Audio
EVGA NU Audio PRO 7.1
Universal / Blu-ray / CD Player
PC BD PLayer
Front Speakers
Martin Logan ESL
Center Channel Speaker
Martin Logan EM C2
Surround Speakers
Martin Logan FX2
Screen
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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denon 3801
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arcam alpha 2
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denon 910
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onkyo
Front Speakers
diy
Center Channel Speaker
dynaudio
Surround Speakers
dali
Surround Back Speakers
dynaudio back
Front Height Speakers
philips
Rear Height Speakers
dali
Subwoofers
dali bose
Other Speakers or Equipment
denon sansui
Video Display Device
samsung
Screen
lg
Remote Control
one for all
Streaming Equipment
android box
Streaming Subscriptions
dac usb
Satellite System
diy spaekers
Other Equipment
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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