Although the information given by LN-KGL is interesting in relation to the noise produced by a single aircraft movement, it has no direct relevance to the 69dB(A)Leq noise contour. It is only properties within that contour which become eligible for purchase by the airport authority.
The Leq noise figure is defined as "the equivalent continuous sound level" based upon the aircraft type mix and number of anticipated movements at an airport. When used to produce a noise contour map it is also defined as "the time weighted average noise level between 07:00 & 23:00". So the 69dB contour on an Leq basis will be very much smaller than the 69bB contour for a single aircraft movement. In fact the 69dB(A)Leq contour projections to 2020 for SEN with its extended runway show it to remain within the airport boundary, with the possible exception of two or three houses on the west side of Southend Road, Rochford.
I think this puts into perspective the extent of any potential liability on the part of Stobarts. Presumably the noise contour map may be amended in the light of 12 months(?) operational experience of the extended runway but it's hard to see that producing sufficient difference to the 69dB noise contour so as to include any other properties.
Last edited by Expressflight; 30th Sep 2012 at 08:34.
Reason: spelling