High-frequency squeak, hum:
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Item falls on concrete
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Close, The metal gates of the grill open
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Laboratory – open, close the freezer
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Police whistle
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Dinosaurs, Jurassic, sounds of the
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The noise of the room, air conditioning,
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Sine wave (975Hz)
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Unlock the bike lock
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Time Machine
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Umbrella pulling telescopic tube
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Chemistry, boiling liquid, burner
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The fall
★★★★★