announcer

noun
1
a person who introduces, or gives information about, programmes on the radio or television
گوینده, گوینده برنامه
see also host, presenter
2
a person who gives information about something in a station, an airport, etc., especially through a loudspeaker
گوینده, اعلام‌کننده, متصدی اعلام
The station announcer warned us that the train was running late.
The PA announcer called out the score.
3
a person who broadcasts at a sports event
گوینده, گزارشگر
a play-by-play announcer