Steve House wrote:

Check again - DC says all theirs are. Haven't looked at Bose and Sennheiser
lately.

Ok, I checked again at http://www.davidclark.com/HeadsetPgs/aviation.shtml
Every non-ANR headset I checked is TSO'd. None of the ANR headsets are (at
least, DC doesn't say they are).

George Patterson
The optimist feels that we live in the best of all possible worlds. The
pessimist is afraid that he's correct.
James Branch Cavel