Originally Posted by
IO540
Do you have a reference for "inaudible" sound emissions from turbine engines,
High speeds (50,000rpm+) = high frequency sounds. Stands to reason, non? If you need the empirical evidence, I'm afraid that you're going to have to search through Nick Lappos' posts in Rotorheads. I don't have the time to do it for you, I'm afraid.
Just de-bunking your supposed 'OWT', you see?
Originally Posted by
IO540
and which ANR headset might help with them?
No ANR headset will help. Because as you rightly pointed out, ANR headsets don't operate in the damaging range. But that was Droopystop's point - although you might think that ANR headsets are protecting your hearing, they aren't really. They just make it easier to hear things.
To actually protect your hearing, you still need some sort of passive attenuation. Either a helmet or earplugs will do (or, ideally, both.)