I have the A20 with Bluetooth.
Is there a way to reduce the sensitivity of the microphone? The microphone picks up on all the ambient noises, such as breathing, pens clicking, air vents, and instrument operation then this noise is reproduced through the headphone completely eliminating the noise canceling benefits. When I have noise canceling on, the headphones are constantly producing the ambient sound of the flight deck.
Another thing I am trying to figure out is occasionally clicking coming through the headphones when noise canceling is on. It sounds like electrical interference but it happens pretty often at various phases of Any given flight in a 737.