拍板器

摄

[ noun ]
photographic equipment used to synchronize sound and motion picture; boards held in front of a movie camera are banged together
<noun.artifact>

clapperboard \clap"per*board`\ (kl[a^]p"p[~e]r*b[=o]rd`), n.
a device which synchronizes sound and picture while making a
motion picture, consisting of boards held in front of a movie
camera, which are are banged together.
[WordNet 1.5]