And what about to use DAC of your usb interface directly with known output level - just one cable to make loop connection and than set DAC output to -80 dB (or any other level)...
And that actually means something. Relative measurements show the behavior - rising response with frequency, etc. Referenced measurements show the performance - what SPL you get for your 1W of input. Also allows "labs" to compare and verify results, as everyone is referenced to the same standard. Hopefully...
After getting the mic calibrator, I probably will only use unreferenced measurements for my own fiddling. If I publish something for other audio eyes to see, I'll probably do the mic cal first, set the ADC gain so the db SPL is correct, then make the measurement. Because I can, now.
Got my calibrator.
Where is the battery compartment??? Am tempted to take a screwdriver to it and take it apart.
Where is the battery compartment??? Am tempted to take a screwdriver to it and take it apart.
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This audio adapter has no gain control and operate over full dynamic range. That could be a solution to your use case : ZOOM UAC32.
A test video :
A test video :
Made me get up from my chair for that re-discovery! How do I know? I can see I replaced it with a Nylon, slot head screw, for next time I need the change the battery I can use an ordinary tool...