What is the point of the machine (clapperboard) that starts a film?

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Just before a film, or interview or whatever starts, there is a little machine called a “clapperboard” where someone says “3…2…1… action” and slams down the top 1/4 of the thing to the rest of it. What is it used for? It also has numbers on it and I guess indicates timing. What is the point of it?

In: Technology

5 Answers

Anonymous 0 Comments

So editors can sync the sound of the ‘clap’ with the visual of the board closing, so all the following sound is in sync.

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