more microphone calibration option?

[zangaidaige]

Hi all
REW sound meter and speaker to calibrate the microphone.
However in lab, we usually use microphone calibrator or sensitivity provide by company.
when I put sensitivity in calibration file and REW shows that only accept USB mic with sensitivity.

However pro mic with XLR output has better performance , signal to noise ratio and dynamic range.
Not sure if it is possible to put sensitivity and preamp gain in calibration file?

 

[John Mulcahy]

Yes, you can do that, see the help.

 

[zangaidaige]

Yes, you can do that, see the help.

The unit provided by factory is 41.4mv/Pa. I need convert to rms sound pressure at 1v and convert to spl.

Most company provide mv/pa so I think maybe it is more easier if has mv/pa option.

 

[zangaidaige]

Can I understand this statement as it is only valid when I keep the interface gain in interface calibration?

 

[John Mulcahy]

The mV/Pa figure is insufficient. The software needs to know how dBFS data values relate to dB SPL, so the overall conversion from mV to dBFS would also be needed, which is affected by preamp gain and any volume controls along the input path. The idea of the solution offered is that you can put the mic in a 94 dB calibrator and immediately read the figure you need.

 

[zangaidaige]

The mV/Pa figure is insufficient. The software needs to know how dBFS data values relate to dB SPL, so the overall conversion from mV to dBFS would also be needed, which is affected by preamp gain and any volume controls along the input path. The idea of the solution offered is that you can put the mic in a 94 dB calibrator and immediately read the figure you need.

Ok I see thanks.