Self noise in several mics
Nov 18, 2015Public
Photo: Sennheiser MKH20
Photo: Sennheiser MKH40
Photo: Sennheiser MKH30
Photo: Sennheiser MKH8020
MKH8020 have around 6-10dB higher output senitivity than other mics in this test which explain the higher noise in the specrogram
Photo: Sennheiser MKH8040
Photo: Audio Technica AT4022
Photo: Audio Technica BP4025
Photo: Rode NT1a
Note: This mic is so quiet you can see the power supply noise in the SD788 recorder. 
There is also some strange AM frequency between 40Khz - 42Khz
Photo: The old MKH8020 left  and new design right.