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Decibel levels way off after following manual 1 year 9 months ago #50295

  • czalarenta
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I've been setting this up and trying to get actual volume levels correct. After following the manual exactly and using the calibration files for my rig, the decibel measurements are WAY OFF. The decibel levels being measured in the rig are far higher than they are in reality, and I don't have any clue how to properly correct for this or get them accurate.

After following the manual TO THE LETTER, the miniDSP ears mics consistently measure much louder than it actually is, by anywhere from 5 to 18 dB. The variance is so all over the place that it isn't even a consistent figure off. Right now I have nothing on the rig and am in a silent room. In addition to the Ears rig, I have the NIOSH app on my phone and a handheld dBc meter. The phone says ~54dB, the meter says ~56 dB, and the ears rig is varying between 68 and 72 dB! This is the worst I've ever seen it. What could possibly be done to fix this?

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Decibel levels way off after following manual 5 months 3 weeks ago #57906

  • Terry-cpu
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I'm having the same problem. My external SPL Meter is a google Pixel 3a using Audio Tools. My noise floor measurements Are around SPL 50dB. 
The SPL Meter inside of REW is reading SPL 115 dB to 120 dB. There is a work around. Within in the SPL Meter Select Logger. When the logger opens up select record.
You should be able to see the correct SPL reading it will be in white. I believe that this is most likely a REW software glitch.There seems to be a problem with the noise floor. It seems like the real value is the highest reading is divided by 2. It's like both mic EARS are being summed together. I have been stuck with this problem for the last 3 days.
I plugged my EARS into my Pixel 3a using a USB -C Male to USB 2.0 female. Launched Audio Tools Android app paid version. The values were very close to the actual value that was
previously measured Using a Dayton Audio iMM-6 / from Amazon on my Pixel 3a. I'm going to check with my pixel to see if I'm getting a stereo sound using EARS and some Stereo Headphones. Good Luck.

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Decibel levels way off after following manual 5 months 2 weeks ago #57994

  • Terry-cpu
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I just purchased the REW Pro version for $100. There is a big difference in the way the SPL Meters work now.
My SPL Meter reading with the noise floor use to be 115 dB to 120 dB I"m now getting measurement noise floor SPL in the 70 dB range
Hope that this could be of some help. Good Luck!

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