A typical David Clark M77 mike specification says :-
Generating Element: Electret condenser
Polar Pattern: Bidirectional Noise Cancelling
This makes sense with the wikipedia link above.
In the cockpit, if someone has a dirty mike (holes blocked) there is a little extra noise. Could that explain the extra noise in this case?
What are the DC muff type mikes?
Last edited by bank_and_yank; 28th March 2009 at 12:52.
Reason: ask about muff type