The Airports Commission* - also referred to as the Davies Commission after Sir Howard Davies who leads it - has published Aviation Noise, the fifth in a series of discussion papers, for public comment. The paper explores current scientific understanding and existing policy on aviation and noise. It discusses the impacts of aviation noise on health, the issue of annoyance and how this develops over time. It considers different methodologies for measuring noise and approaches to mitigation. And it looks at specific issues, including night noise.