From the pilot perspective I want to know how to deal with the noise in the cockpit on the turboprop aircraft while long-run flights.
The reason is old type aircraft with bad headphones which doesn't protect from noise than they should be.
The most common way to deal with noise in the cockpit is to get yourself a noise canceling headset. There are a bunch of models out there but the most common seem to be the Bose and the Lightspeed. I personally have the lightspeed and will attest to at least a 30%-50% perceived noise reduction over my old passive headset.