I see a big problem right there. The response of a room must include the response of whatever speakers are used. Where they are placed in the room has a big influence too. For a control room this is not so much a problem, because the speakers are already chosen and likely in their final place. But to measure the response of a recording space you need a speaker, and you need to put it somewhere. I'll go out on a limb here and say that the "response" of a large-ish recording room is irrelevant. What matters most is the room's RT60 at each third-octave frequency. Maybe Jeff can add more.
As for the rest, as Amir said my company's web site has many educational Articles and Videos. Since you mentioned measuring rooms, these articles in particular will help you:
Room Measuring Primer
Test Methods for Acoustic Treatment Products
Comparison of Ten Measuring Microphones
--Ethan



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