Comments on Profile Post by spwath

Dayton Audio UMM-6 and Room EQ Wizard:
https://www.parts-express.com/dayton-audio-umm-6-usb-measurement-microphone--390-808
https://www.roomeqwizard.com/

I do have a mini dsp mic and Rew, but can you measure reverberation time with that? Plus needs a computer with it.

reverb time, ETC, many other features:
https://www.roomeqwizard.com/features.html

I will have to look at it more. I have really only used it to measure frequency response of headphones and speakers. Then in my classes we used fancy B&K 2250 sound level meters to measure reverb time and such

I have fancy NT-Instruments + ACO Pacific system and B&K mic calibrator with NIST calibration. Accuracy is on par with 2250. Cross calibrating REW+umik-1 and accuracy is on par with 2250 at room temperature and standard air pressure.

Part of the expense for higher end mics and systems includes accuracy over temperature, altitudes, air pressure, etc. Residual noise is typically lower on expensive mic capsules allowing quiet environment measurements.

That's good too know that the umik-1 is still very accurate. We also have a b&k head in the anechoic chamber, I'll have to see if I can measure some headphones on that some time.

Where exactly do you work/what do you do @atomicbob ? Sounds interesting, and like the field I am going into

I work for a major medical device company. Responsible for device audio recording and sound systems; alarms, alerts, voice prompts, CPR metronomes, etc. Must work in noisy environments, hence psycho-acoustics involved. Have worked off and on as tracking, mixing, mastering, SR FOH and Cue Mix engineer in addition to running a project studio like a gazillion other people. Technical adviser to AES.

Also responsible for two Audio / Acoustic labs, one corporate and one personal, both maintain NIST traceable calibrations and pass muster for many regulatory agencies such as CSA, TUV, FDA, etc.

I always forget how many fields actually have audio stuff in them. Basically every field.