Mic noise test
Oct 24, 2011Public
Photo: Switching between NTG3 and NT1a. 
This spectrogram shows frequency range up to 48Khz. 
NTG3 have "pink noise" in the whole spectrum. It slightly get higher between 16khz and 24khz (slightly more yellow color).
NT1a almost without measurable noise. Dark color mean silence.
The horison lines at 27khz and 33khz are power supply noise in the SD552 mixer. 
It appears when gain is adjusted ca. +60dB and above.

See another test with SD744: http://fieldrecording.net/2012/02/14/rode-ntg3-vs-sennheiser-me66-noise/
Photo: Switching between NTG3 and NT45
Photo: Switching between NTG3 and NT55
Photo: Switching between NTG3 and ME66.
Both noise and sensitivity was almost equal between this two mics. 
The strange things in this test was the high level of "pink noise"in whole frequency spectrum in NTG3.

See another test with SD744: http://fieldrecording.net/2012/02/14/rode-ntg3-vs-sennheiser-me66-noise/
and
https://picasaweb.google.com/104187345157190691446/RodeNTG3VsSennheiserME66
Photo: Power supply noise in SD552 mixer after having a "start up failure" (most of the horizon lines)
The mixer was connected to NTG3 and NT1a.
Normally it disappeared when switching OFF, and ON again. 
Most people that can not detect sound above 12khz will never notice this oscillation