Headsets in commercial aircraft - need for approval?

[Dan Winterland]

I think this stems from a directive from Airbus after several incidents where pilots using their own headsets have caused problems. If the impedence of the microphes is different there can be an imbalance leading to problems in the intercom circuits.

I have experienced this myself, both on Aibus and Boeings.

We have alo been told that only headsets apporoved by the manufacturer are to be used.