Definition of Category D for Minimum Standards for Noise Modelling

Closed 8 Mar 2021

Opened 25 Jan 2021

Published responses

View submitted responses where consent has been given to publish the response.


In January 2020, the CAA first consulted on its proposed minimum requirements for noise modelling. Following feedback from this consultation we decided that the definition of Category D needed to be amendend and the CAA is now consulting on the new definition.

A consultation document where the CAA puts forward options and its proposal for the new definition of Category D requirements has now been published and upon which we invite comments. We will consider any response we receive before the closing date publishing our final requirements.

How to respond to this consultation

Please let us have your comments by following the "Give us your views" link below.

If you are not able to use the online consultation and wish to send a self-contained response we ask that your comments are structured around our questions. Otherwise we will not be able to analyse the submissions in the same way that we analyse the online responses.

This consultation closes on 8 March 2021. 

If you would like to discuss anything about how to respond to the consultation, please email


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