Misleading announcements

Silly question maybe, but is there any possibility that a fault in the audio outlets can make it impossible for the driver to hear the automated announcements in the cab of an S-stock whilst they continue to be heard by the passengers? Not suggesting this happened above, just a general query.

The driver probably wasn't listening to the announcements - after all, he knew where the train was going - so unless someone drew it to his attention he would not have noticed anything amiss.

I don't know how the announcements are triggered but if it's by location there may have been a misreading issue - on SWT we often get "roundabout" services telling us we are approaching the station we've just left and that the train is heading out of town when it's on its way back in: most noticeable at Queenstown Road because clockwise trains only call on the inbound leg and anticlockwise ones only on the outbound - "Mind the gap" it says, when the train isn't stopping and there are four other tracks between the train and the platform!

I have stopped trusting announcements long ago. They are often confusing, misinformed or bordering on lies if you ask me.

We've probably all been there, "Good service on all London Underground lines" announcements while you are busy trying to find an alternative route because two lines are suspended and another suffering from severe delays.

That feeling of being lied to because you can see with your own eyes there is no good service, despite these announcements. Last year me and probably a thousand others had to wait in morning rush hour at Bethnal Green in front of the gateline, queues out onto the street. The Central Line suffered severe delays, the platforms were dangerously overcrowded so they shut the station. Standing there, for 20 minutes, knowing something is seriously wrong and all wondering why the announcements keep insisting there is a good service on all lines.

Some time ago I got into a heated argument with the station supervisor at West Kensington. The Piccadilly Line was suspended on the eastern half in afternoon rush hour because of some serious incident. As a result tens of thousands of people tried to get into town using the District Line. This caused the District to become severely delayed very quickly resulting in overcrowding on the West Ken platform because the very few trains that did come were packed to the rafters. All the while the local (not those all-network announcements) announcements kept saying there was a good service on all lines. The people on the platform got increasingly angry with the situation and I wouldn't have been surprised if a fight had broken out between people in their struggle to board a train. All to the tune of repeated good service announcements. I tried to find the person responsible for the announcements because the repeated lies over the tannoy weren't exactly helping the situation. I ended up speaking to the SS through the thick glass of the ticket office who said the announcement, although local, was a prerecorded message he made an hour earlier and was just on a loop. He said he could only disable it from the platform and because he refused to leave his office we were just going to hear for quite a while still.

The overall problem is that if people increasingly distrust the announcements as a reliable source of information they lose their function all together.

If a passenger believes that the DVA is incorrect, should they alert the driver (by knocking on the J door?) to this? (when the train is stationary at a platform, obviously)

No one has commented until now on the original poster's assertion that this "despicable" happening started in platform 1 at Edgware Road, and the train then went west to Paddington (Circle and District). As far as I know there is no signalled move west from Edgware Road platform 1, so I query the veracity.
Assuming it was actually from another platform, the most likely explanation is simply selection of an Outer Rail trip in error for an Inner rail trip on the CIS.
I think most passengers would agree that it would be very annoying and distracting for the CIS announcements to be made in the T/Op's cab. It's standard practice not to do that on all LUL trains.