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clapperboard

British  
/ ˈklæpəˌbɔːd /

noun

  1. a pair of boards clapped together during film shooting in order to aid sound synchronization

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Memorabilia includes a clapperboard used for The Man Who Fell To Earth, and his first instrument, a Grafton Alto saxophone bought for him by his father in 1961.

From BBC Jul. 1, 2026

The two-minute teaser video opens with a shot of a clapperboard before showing a montage of well-known locations from the show such as Hawkins High School.

From BBC Jul. 15, 2024

But he neglected to use a clapperboard to sync up the visual footage with the audio, making it next to impossible to match the sound with screen imagery.

From Los Angeles Times Aug. 11, 2022

While the clapperboard oversight may have scotched the original release, Elliott feels it created a secondary gain.

From The Guardian Apr. 8, 2019

As they circle each other in a damp mating dance, the actor Kyle Beltran sits upstage, marking each scene change with a clack on a clapperboard.

From New York Times Jul. 17, 2018

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