Idea, Theme
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Examples
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Sound
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Sound
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Sound
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Puzzle
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locking, mechanical clicking
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Enlightenment
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gong, bell, ding, spark
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Gallery of gongs
Gallery of Ghana bells
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Gallery of Glockenspiel sounds
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Flow
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Rivers, streams, fluids
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Crowd
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Noisy outdoor crowd, clapping crowd, voices, choir
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Geography
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Gravel under boots, commuter jet, commuter train,
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Literature
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Pages flipping in a book, books, typing
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Gallery of sounds of pages turning
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Education
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markers, chalkboard,
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Math science
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beeps (sputnik), camera shutter release
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Gallery of achemical elements
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Sport
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Race cars, basketball dribbling, shoes on gymnasium squeak, scoreboard buzz, Referee whistle
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History
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Clock ticking,
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General ambience
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Campfires, forests, deserts, wind
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Gallery of Ambience
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Biology
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Heartbeats, cricket chirp
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Art
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Music
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Connections Forming
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Knowledge Growing
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Question & Answer
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Trusted Information
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Free & Open knowledge
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