Noise Certification

Noise Certification is the ICAO Annex 16 / FAR Part 36 system of classifying aircraft by their noise output, measured at specific points during approach, flyover, and sideline. Aircraft must meet noise standards to be certified for operation.

Chapter 3: Older jets (being phased out at many airports)
Chapter 4: Current standard — 10 dB cumulative margin below Chapter 3
Chapter 14: Newest and strictest standard — 17 dB cumulative margin below Chapter 3

Noise certification affects:

Airport access — many airports restrict Chapter 3 or older aircraft
Operating hours — noise-sensitive airports limit night operations based on certification
Landing fees — many airports charge higher fees for noisier aircraft
Noise abatement procedures — preferential runways, CDAs, and departure profiles