Complaining about anti-social technical engineers.......hahahaha. Posted by my iPhone, Matt J BS Aerospace Engineering.
Seriously though, sounds like you need to talk to them about meeting etiquette and how their actions negatively reflect on them. We have senior managers that hammer away on their Blackberries during meetings, so it's not an age thing necessarily. In regards to the music, if it allows them to better focus on the work at hand, who are you to judge? We have designers of all ages that listen to music because it allows them to tune out distractions and focus on the job at hand. I'm a manager, I spend too much time talking to others for it to be practical.
Just ask yourself which aspects of their behavior are simply different vs those that impede productivity.