Originally Posted by
m32k
In addition please cross check the a/c manufacture RFM/POH/FM or publications: in modern a/c most probably you've a list of approved headsets.
Never seen the POH address any such thing in the civilian world. Some operators (airlines) may levy requirements (e.g. TSO'd headset, etc.), but I've never seen it in a POH, and it's not something that would properly be in a POH.