Pearstone SAI-5334 Acrylic Slate Insert

In motion picture and videotape production, a clapperboard is a device used to assist in the synchronizing of picture and sound; additionally the clapperboard is used to designate and mark particular scenes and takes recorded during a production. Many other names are commonly used, including clapper, clapboard, slate, slate board, sync slate, time slate, sticks, board, and marker. The sharp "clap" noise that the clapperboard makes can be identified easily on the audio track, and the shutting of the clapstick can be seen on the separate visual track. The two tracks can be exactly synchronised by matching the noise and movement.