I'm trying to estimate the [Effective Perceived Noise][1] (EPNdB) of the [GE9x][2]. GE Aviation says that it will be within 8 dB margin of the [stage 5 noise regulations][3], can anyone confirm that?


  [1]: http://www.icao.int/Meetings/EnvironmentalWorkshops/Documents/Noise-Certification-Workshop-2006/Depitre_4.pdf
  [2]: http://en.wikipedia.org/wiki/General_Electric_GE90
  [3]: https://www.faa.gov/about/office_org/headquarters_offices/apl/noise_emissions/airport_aircraft_noise_issues/levels/