As some one with 4 measurement mics, and several measurement software kits your best bet is a phone with a calibrated mic! :)
https://amzn.to/2LuAjcf
I use this on my android with Audio Tools, which can read the calibration file and give me near perfect results. It is not OSHA or NSF certified, but damn accurate, especially relatively.
Best,
Erik
https://amzn.to/2LuAjcf
I use this on my android with Audio Tools, which can read the calibration file and give me near perfect results. It is not OSHA or NSF certified, but damn accurate, especially relatively.
Best,
Erik