I recently learned that you can mute some of these! I've had success with the top right or second from the top on the right button near the screen. No reason not to try them all if you're a captive audience anyway...
I spam all the buttons on any pump to attempt to mute it, and like you have had success with top right, or second from top on the right having the highest success. In my area, I'm only about 1/4 in being able to mute it, but when it works, usually top right.
I wonder if I could just get a powerful electromagnet and use it to rip the coil out of the speaker. Would be a benefit to society.