Originally Posted by citsur86
Looks good! What is your noise floor? Asking because I thought I remember the suggestion being to measure at 40db higher than the noise floor and noise floor in most cases being around 50db. Not sure if it really effects the measurements much, but maybe run a couple sweeps around 90db and see how it looks.
noise floor is pretty low, below what the UMIK-1's limitations are (I believe it is limited to 50dB noise floor based on Jerry's guide, page 50):
"Your listening room’s noise floor
Using the REW SPL Meter, click the red record button. Make the room as quiet as possible—turn off the HVAC system, turn off appliances such as the refrigerator if it is within hearing distance, quiet the wife, kids, pets, etc. When things are as quiet as possible, the REW SPL Meter is displaying the noise floor in your room. Most typical listening rooms with have a noise floor of approximately 40dB. However, with the USB mic’s we are seeing readings of 50dB, which is the lower limit of the USB microphone’s measurement range.
In any case I have measured 10dB higher before, and aside for distortion figures being lower and perhaps some very low dB noise in waterfall, there is no noticeable difference between 75dB peak level and 85dB peak level (based on spectrogram scale method). I did measure LFE at 85dB (just used a -10dB offset afterwards) and FL+FR+sub was 6dB higher than the individual parts, but again used -6dB offset afterwards to compensate).