I was just looking at the mics presented on REW website and to get a feel for if microphone SNR has an influence on typical (non-anechoic chamber) measurements. A quick look at the specs for Dayton EMM-6 indicated it provided 70dB SNR, and the UMIK-1 was just a bit better.
Has anyone noticed mic SNR as a concern for testing ?
I recently got two ACO electret mics, each with a preamp, and a Cirrus CRL511E calibrator that allows each mic to be isolated from ambient, especially above a few hundred Hz, where the noise floor around the calibrator 1kHz fundamental test tone is about -110dB. Those mic's supposedly have ruler flat response (the worst being 10-20k to 0.1dB), and I'm hoping their ~25yr age hasn't degraded response.