Breadcrumb Home > Dictionary > Index S sound head: Meaning and Definition of Find definitions for: sound' head" Pronunciation: [key] — Motion Pictures. Motion Pictures. a mechanism through which film passes in a projector for conversion of the soundtrack into audio-frequency signals that can be amplified and reproduced. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sound film sound hole TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: parallax Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language