I have an NTI Audio XL2 with a MA220 mic, and am trying to match the SPL RTA measurements in REW with a uMik-1. The broadband SPL measurements are pretty close to each other, but the 3rd octave measurements are quite far off, particularly in the higher bands (up to 10dB at 20kHz).
Here's my setup:
NTI: RTA analyser, 3rd octave bands, Z weighting, live (slow setting), Hann window
REW: RTA 1/3 octave, no smoothing, Z weighting (dB), No averaging, Hann window
The mic capsules are as close as I can get them. I would expect a small difference between the measurements, but up to 10dB at 20kHz seems to suggest there is a mismatch in the setup. Just wondered if anyone has any ideas of what to check?
Also, I ideally want to take LeqZ 30 second measurements in REW. It looks like I can do this in the SPL window, but I can't see if it's possible in the RTA window. Any help would be much appreciated. Thanks
Here's my setup:
NTI: RTA analyser, 3rd octave bands, Z weighting, live (slow setting), Hann window
REW: RTA 1/3 octave, no smoothing, Z weighting (dB), No averaging, Hann window
The mic capsules are as close as I can get them. I would expect a small difference between the measurements, but up to 10dB at 20kHz seems to suggest there is a mismatch in the setup. Just wondered if anyone has any ideas of what to check?
Also, I ideally want to take LeqZ 30 second measurements in REW. It looks like I can do this in the SPL window, but I can't see if it's possible in the RTA window. Any help would be much appreciated. Thanks