During sports events, there's a "trumpet sound" which is played in game time, particularly in the NBA when team is on attack / ball possession. The same sound is used by default in the NBA 2K14 video game as well. What does this sound mean?
This sound is a bugle call known as "Charge." This short music clip can be heard at different sporting events. From a sports perspective, this sound is intended for the players (and fans) to take action.