''Xbox 360's Achievements make a noise when unlocked. Not only that, a recognizable noise. But what about PlayStation Trophies? Will they make a noise? When the Sony 2.40 Firmware FAQ went live yesterday, it was sadly noted that the PS3 Trophies would not make an in-game sound effect when achieved. Wrong! Says Sony's Jeff Rubenstein:
Actually on my way home, I got an email from Eric [Lempel, director, PlayStation Network Operations] asking me to update this post; there *will* be a sound effect when a user unlocks a trophy. You'll be hearing it soon enough. Hopefully a lot...''
http://blog.us.playstation.com/2008/06/30/firmware-v240-faq/