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sound projector

noun
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Definition of sound projector

: a motion-picture projector equipped to reproduce photographically and magnetically recorded sound from one or more sound tracks in synchronism with picture projection from the same film

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“Sound projector.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/sound%20projector. Accessed 20 January 2020.

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