I totally agree that we should all be trying to protect our hearing but, unfortunately, ANR headsets might not be the answer.
This was discussed
back in 2002 and according to Nick L (half way down the first page of the old thread), ANR headsets don't necessarily cut out the damaging higher frequencies.
Ear Defenders (whilst outside the aircraft) or ear plugs (under a headset) might be the answer...
Regards,
B73
Aha. Edited to add that Heliport has now merged the old thread with the new one. My post doesn't seem to make much sense other than to say "Please refer back to page 1 of this combined thread"