Can anyone point to info / techniques for measuring microphone self noise?? I will be recording bird and wildlife sounds and soundscapes in very quiet surroundings in Africa. I realize measurements I do will include the preamplifier noise floor. I will have at least one IN163 based preamp that's pretty low noise. I'm more concerned about a quiet microphone test environment. I visualize a very absorbant small box with heavy walls, in an already low-SPL environment. Hmmm.. Anyone done this?? I need to characterize some existing dynamic mikes and low-cost condenser types against at least one known low-noise condenser such as a ROde NT4 (16dB-A DIN) . Anyone done this?? Thanks!