announcer
an·nounc·er
/əˈnaʊnsɚ/ noun , pl -ers [ count ]
1 : a person who gives information on television or radio
He works part-time as an announcer for a local radio station.
2 : a person who gives information in a public place (such as a store or airport) especially using a loudspeaker
The racetrack announcer said that the next race was about to start.
a public address announcer [=a person who makes announcements over a public address system]
3 US : a person who describes a sports event for television or radio
The announcer said that the catcher had injured his shoulder.