FAQ Answer
FAQ Answer
How do I purchase the latest annual contour reports for Heathrow, Gatwick and Stansted?
The latest annual contour reports for Heathrow, Gatwick and Stansted are published by the Department for Transport (DfT) on its website.
The DfT can also supply the contours in electronic DXF format, or as hard copy overlays on Ordnance Survey digital maps
Environmental Factors
- How do I make a complaint about aircraft noise?
- What is a decibel?
- What does the ‘A’ in the dBA unit mean?
- What is Leq?
- If the number of aircraft noise events is doubled, the noise level only increases by 3 dBA, why?
- What do aircraft noise exposure contours show?
- How are noise contours produced?
- Are there other noise models available, and are they the same as ANCON?
- Why is the 57 dBA contour considered important?
- I live outside the published 57 dBA contour and I am overflown; I can hear aircraft and it annoys me - how is this possible?
- What is Lden?
- How is helicopter noise modelled?
- What are the 'Chapter 2' and 'Chapter 3' aircraft noise classifications?
- What is the new 'Chapter 4' noise standard?
- How do I purchase the latest annual contour reports for Heathrow, Gatwick and Stansted?
- How do I purchase other reports produced by ERCD?
