CDA in the A330 usually involve some use of speedbrake-which in itself generates noise.A few more track miles calls from ATC would help those of us operating aircraft with basic kit
This also explains why the skipper I flew with the other day(an ex 320/330 F/O) seemed so bloody nervous that I used airspeed rather than speedbrake to descend in the required track miles!
By the way..have you ever been on the end of an SRA into LGW? its plain scary
