I once played some Hunt (difficult, highly competitive game, a little like CS) with people on ex professional level. They obviously had gaming PCs, but they ALL had super expensive 7? Channels headphones. It's apparently a thing among ex pro (or high level) Counter-Strike players to have these super headphones that let you know where people are before regular people can hear them.

They hushed me all the time because "someone's coming". Still a fun experience - to win for a change. Don't have to add that my role was more as a decoy then anything else.