Whilst this won't affect the noise from sound hitting the head in I have "improved" on my headset somewhat. Caveat, this is not an advertisement for a manufacturer it is only my journey which has worked out well.
- I flew the 332 and 225 with the noise generators directly above my head.
- I bought a Lightspeed Zulu as the earcup material is supposedly made of Magnesium and thus more noise attenuating but I then decided to improve on this with a sheet of dynamat (car door insulation) and my HSE rep measured the sound and was shocked at how low the noise was.
- I also wear 9dB earplugs under my headset which reduces the high pitch hiss from ANR and avionics, they are moulded silicone plugs with inserts that can vary the noise attenuation. I recently found a small blob of blue tack clears the dirt off and returns the earplug to new clarity.
So ladies and Gents, your hearing is valuable please protect it, research and use products that will help you do so and innovate where needed.
Safe flights
Si