I used an iBG Star for a while, but moved away from it when I found another meter used cheaper strips, which matters when one is self-funding.
I can't recall specifically if the iBG Star can run totally silently, but as I always do run in silent mode, I'd be surprised if there wasn't an option. I have no wish to fairfare to all and sundry if I'm testing.
You could try emailing Sanofi support and see what they say? When I reported the on-board battery of my iBG Star had failed, they sent me a MyStar Extra, which is a bigger meter, but it does more, including all the usual HbA1c predictions and so on.
I hope you find something that suits.