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2
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Something detects sound
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3
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The loudness of a sound
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4
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A signal used to represent letters or numbers
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5
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An object or material that vibrates in a way that makes sound
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6
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The speed at which something vibrates
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7
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A funnel-shaped device that can amplify sounds at a receiver
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8
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To make a sound louder
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9
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A rapid back-and-forth movement
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1
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How high or low a sound is
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2
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The ability to identify sounds as different from one another
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