The Announcer reference article from the English Wikipedia on 24-Jul-2004
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Announcer

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An Announcer is a voice actor who works in television, radio and film, usually providing narrations, news updates, station identification, or an introduction of a product in television commercials or a guest on a talk show.

Announcers usually read prepared scripts, but in some cases, they have to ad-lib commentary on the air when presenting news, sports, weather, time, and commercialss. Occasionally, announcers are also involved in writing the script when one is required. Sometimes announcers also interview guests and moderate panels or discussions. Some provide commentary for the audience during sporting events, parades, and other events.

See also: Sportscaster, News anchor, Disc jockey

Notable radio and television announcers: