DESCRIPTION
A clapperboard is used in filmmaking and video production to assist in the synchronizing of picture and sound. The sharp clap noise that the clapperboard makes can be identified easily on the audio track, and the shutting of the clapstick can be identified easily on the separate visual track. Other names for the clapperboard include clapper, clapboard, slate, slate board, sync slate, time slate, sticks, board, and marker.