A E-image 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 identified easily on the
separate visual track. The two tracks can then be precisely
synchronised by matching the sound and movement. ->Other names
for the clapperboard include clapper, clapboard, slate, slate
board, sync slate, time slate, sticks, board, and sound marker.
->The clapperboard, clapboard slate or film slate is the
combination of the chalkboard slate that holds information
identifying the next scene and the clapstick which is used to
align sound and picture. ->In the early days of film, one person
would hold a slate for the camera with the scene information,
while another clapped two hinged sticks together in front of the
camera.The combination of the two into one unit made it possible
for one person to perform both tasks.