sound head

American  

noun

Movies.

1. a mechanism through which film passes in a projector for conversion of the soundtrack into audio-frequency signals that can be amplified and reproduced.

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sound head British  

noun

1. the part of a film projector that reproduces the sound in a film

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Etymology

Origin of sound head

First recorded in 1930–35

Example Sentences

Then Raften stepped into view, loud-voiced, externally coarse, but blessed with a good heart and a sound head.

From Two Little Savages Being the adventures of two boys who lived as Indians and what they learned by Seton, Ernest Thompson

Washington sent him Arnold, the dare-devil of the army, and Lincoln, a man of sound head, steady hand, and even temper, as a counterpoise to Arnold's over-confident and impetuous nature.

From Burgoyne's Invasion of 1777 With an outline sketch of the American Invasion of Canada, 1775-76. by Drake, Samuel Adams

If he did not always run well it was not for want of a sound head or a sharp eye. 

From Samuel Rutherford and some of his correspondents by Whyte, Alexander

He had a sound head, and a heart equally sound.

From Thirty Years in the Itinerancy by Miller, Wesson Gage

It is chiefly this sensibility that constitutes genius; to which a sound head and a good heart are as effectual as a lively imagination.

From Essays on Taste by Cohen, Ralph