My take on this kind of announcement structure, independent of language: the specifics (e.g. train/flight number) should be repeated at the beginning and end of

My take on this kind of announcement structure, independent of language: the specifics (e.g. train/flight number) should be repeated at the beginning and end of the message. Why? Because people listen differently, also depending on the context and how many low-importance messages are being broadcast into the environment. When I'm at a station/airport and there is an announcement every two minutes of something mundane, e.g. which platform or gate is the next departure, I filter them all out, because I've already looked up that information on the screens or on my phone. Only when I subconsciously register something like 'cancelled' or 'changed platforms' or 'severe delay' do I start listening to hear if it is pertinent to me or not. That's when it's useful for the announcer to reiterate which service they are talking about, for those who only started paying attention half way through the message.