Edit: Since determining the noise floor is a topic that comes up repeatedly, can you help me draft a simple instruction that can be included in the guide? I already have a brief discussion of noise floor in the section on mic calibration? Does this section need some re-wording? Any help would be appreciated.
Great idea and I hope you and Markus will do that. Even after reading several specific posts on the topic I am still a bit unsure on EXACTLY how the test should be set up and ran. I am getting around 26-30 dB based on how I ran it (in a well isolated room) but would like to make sure I'm doing it correctly (just SPL Meter, SPL meter and logger, combine with RTA etc).
Edit: Here's an example of what has me confused. I just did a reading as shown below with both the spl logger and RTA running.
You'll see that the spl logger and meter reflect around a 43 dB level, while the RTA (with spectrum chosen) only registers close to 30dB at the highest. Why do these not track each other and which should be used?
Seems to me that if my mic is hearing something at 43dB that same information should be showing up somewhere in the frequency spectrum in RTA.
Edited by fotto - 7/13/13 at 8:04am