Ronster said:
Without watching the scene of the chamber where his helmet is put back on theres a good excuse for a pressurised air sound effect or some enhancement to when the helmet is fixed back on to vader.
Without watching it i don't recall any sound effect when the helmet is put back on in the chamber
There's already an excellent pressurizing sound effect. It's been making my head hurt since 1980. Sounds like it would suck your eyes out!