High-frequency squeak, hum:
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Choir singing under the organ, Church
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Throw an old bike to the ground
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Item falls on concrete
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Battery Hits
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Voices, sounds of, In the school corridor
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The fall
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Briefcase, close the castle, open, Diplomat
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Servo motor
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Ventilation inside, The noise of the room
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Unlock the bike lock
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Stir the liquid in a beaker, Chemistry
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Walking big robot
★★★★★