EK uses whatever is stated in the state or individual airfield charts. In the absence of that guidance then a variation of NADP2 is used, i.e. 1000/1000.
Several different noise abatement procedures have been developed over the years, some suit close in noise, some more distant. Different Aircraft have different noise footprints. I have seen a lot of confusion when a previous operator has used a different default noise (ICAO A 1500'/3000") due to a different type of aircraft or operation. This is then pervade as standard noise. For EK standard noise is 1000'/1000'
Can't wait for the different opinions to start. However it's not anything I will loose sleep over.
DD