Is this Airbus thing a mandatory procedure or merely a recommendation? Depends on the wording. The word 'should' is not quite the same as 'must' and perhaps some allowance needs to be made for French to English interpretation.
Also, in many jurisdictions an operator may vary procedures - plenty do. The best statement I ever saw was in an American FCOM where they said that some SOPS had been changed from Mr Boeing's as a result of operational experience, FAA was aware of these changes, and the airline accepted full responsibility for any damage resultant from changes they had made. Most of it was minor stuff such as perhaps doing some pre start checks in a sequence more suited to their dispatch arrangements.
However, your airline may not be willing to change any words in any manual, perhaps because of legal or (more likely) cost constraints.
So, if it really is as prescriptive as you believe, you are stuck with whatever Airbus say. What would I do? Step one would be minor civil disobedience, like telling the F/O to (please) turn off his bloody speaker. Of course you, or your F/O, may be far too law abiding to even consider such a heinous act.
If that is the case and interference is causing communication problems for you while adopting SOP, write it up in the tech log. And keep writing it up. And again and again - every time it pisses you off. Because it would seem that it is a design issue. Or simply some bored Airbus back room boffin having nothing better to do than write anal procedures to annoy pilots.
Last edited by Mach E Avelli; 3rd Oct 2014 at 23:13.