Never having used or owned headsets with active noise cancelling, I am - again - blessed by my ignorance. More relevant, O/P knew there was no ANR yet decided to buy it
I think you and Peter are talking at cross purposes when it comes to noise cancelling.
I think you are talking about what's known as Active Noise Reduction or Electronic Noise Cancelling and refers to the speaker part of the headset. It attempts to reduce the ambient noise inside the ear cup by creating an inverse sound wave.
I think what Peter is talking about a noise cancelling microphone which attempts to remove background noise from what the microphone detects.
Peter's link doesn't work but if it's how to make a mic then unfortunately I imagine that it's way beyond what I'm capable of.
The ready made one would be perfect, but unfortunately I can't see any way of attaching it to the boom. So I think I'll give Jan's suggestions a try and see if they can make a satisfactory solution.
Thanks for the advice guys!
Colm
The link I posted is very very slow. It appears to be a home server on ADSL and using dyndns to get the public IP.
But yes you are right. A noise cancelling mike is used on all aviation headsets - it has to be. ANR is a different system used to cancel noise entering the ears.
Yes, I had realised my confusion, too. Apologies!
