A professional who announces information of interest to patrons of sporting and other entertainment events, using public address system. Responsibilities include:

• Announces program and substitutions or other changes to patrons.
• Informs patrons of coming events or emergency calls.
• May observe sporting event to make running commentary, such as play-by-play description or explanation of official decisions.
• May speak extemporaneously to audience on items of interest, such as background and past record of players.
• May read prepared script to describe acts or tricks during performance.
• May furnish information concerning play to scoreboard operator.