Clapperboard

A clapperboard is a device used in filmmaking and video production to assist in the synchronizing of picture and sound, and to designate and mark particular scenes and takes recorded during a production. The sharp `clap` noise that the clapperboard makes can be identified easily on the audio track, and the shutting of the clapstick can be identi.....
Found on http://en.wikipedia.org/wiki/Clapperboard

clapperboard

noun photographic equipment used to synchronize sound and motion picture; boards held in front of a movie camera are banged together
Found on https://www.encyclo.co.uk/local/20974

clapperboard

[n] - photographic equipment used to synchronize sound and motion picture
Found on http://www.webdictionary.co.uk/definition.php?query=clapperboard
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