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UK Civil Aviation Regulations

These are published by the CAA on our UK Regulations pages. EU Regulations and EASA Access Guides published by EASA no longer apply in the UK. Our website and publications are being reviewed to update all references. Any references to EU law and EASA Access guides should be disregarded and where applicable the equivalent UK versions referred to instead.

The first edition of CAP1506 described the aims, sampling strategy, determination of noise exposure, analytical approach and the results of the Survey of Noise Attitudes (SoNA) 2014 study.

This second edition has been produced to address two issues identified in the noise modelling following publication in February 2017. The first concerned an underestimation of LASmax noise levels for several important aircraft types. It was also discovered that logarithmic averaging had been inadvertently used instead of arithmetic averaging when accounting for the runway modal split. Both of these issues are explained in this report, and any associated tables and figures have been changed. The overall conclusions of the SoNA 2014 study remain unchanged.

Supplementary reports and data has been published alongside this revised report:

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